We can supply scrap electrical air conditionings engines and refrigirators engines. Specifications : 11kg - 50kg per unit, Cu contain %10 , steel %90 Origin : Tunisia & African Sudan Total Qty : 5000mt - 7000mt Loading Place : Tunisia & Africa Sudan Destination : ... Price : US $525/mt Payment : 100% LC at sight Package : Bulk shipment
Fengyue Aluminum Titanium Boron will provide the following advantages to Aluminum Alloy: 1.Improve the strength and toughness of aluminum alloy. 2.Eliminate columnar grains and feathery grains. 3. Improve the intrinsic quality of aluminum products by reducing the internal shrinkage cavities, porosity, hot cracking and segregation. 4. Increase more flexibility during the plastic deformation of the subsequent processing in the casting by improving its ductility 5. Reduce surface defects of aluminum product by improving its ductility. 6. Improve calendering rate and productivity on the premise of ensuring the quality of products. 7. Increase the using time of the calendering molds and auxiliary equipments on the premise of ensuring the quality of products. 8.Make the surface of aluminum more beautiful by improving the surface treatment of aluminum products Chemical Composition AlTi5B1: Ti:4.5-5.5% B:0.8-1.2% Fe:0.3%Max Si:0.2%Max V:0.1%Max AlTi3B1: Ti:2.5-3.5 B:0.8-1.2% Fe:0.3%Max Si:0.2%Max V:0.1%Max AlTi5B0.2: Ti:4.5-5.5% B:0.15-0.25% Fe:0.3%Max Si:0.2%Max V:0.1%Max AlTi5B0.6 Ti:4.5-5.5% B:0.55-0.65% Fe:0.3%Max Si:0.2%Max V:0.1%Max Shape and Packages Cut Rod: 9.5-10MM in diameter, 500-1000MM in length, 1000KGS / pallet or wooden case Coil: 9.5-10MM in diameter, 180-220 KGS /coil, 3 coils/ pallet Small Ingot: 25KGS/carton, 1000KGS/pallet Cast cut bar: According to the length of the bar Customer-made products for accurate and easy use could also be supplied.
Advantages of Aluminum Titanium Carbon(Al-Ti-C ) - AlTi5C0.20 1. Nucleation rate of Titanium Carbon Aluminum Grain Refiners is Five Times as quick as Aluminum Titanium Boron. The desired modification effect will be seen in three minutes after Al-Ti-C is added. Refining effect of aluminum is very significant and the refining time could keep 45-60 minutes. 2. Effectively reduce the pinholes of aluminum foil as sizes of heterogeneous grain Tic is sub-micron, widely dispersed and disaggregated, so it's perfect for the process of aluminum foil. 3. Titanium Carbon Aluminum master alloys is much purer than Al-Ti-B, as potassium fluoridate isn't added during the production of AlTiC Grain Refiner 4. Reduce the inclusion content and eliminate the oxide layer and defects on the surface because of no TiB2 agglomeration in Al-Ti-C master alloys. 5. Al-Ti-C alloy can bring A356 Aluminum alloy wheels better mechanical property and higher elongation rate when used as grain refiner than the best Aluminum Titanium Boron. 6. Al-Ti-C alloys have more advantages for the casting production of aluminum alloy for nuclear industry which cannot include boron. Shape and Packages Cut Rod: 9.5-10MM in diameter, 500-1000MM in length, 1000KGS / pallet or wooden case Coil: 9.5-10MM in diameter, 180-220 KGS /coil, 3 coils/ pallet Small Ingot: 25KGS/carton, 1000KGS/pallet Cast cut bar: According to the length of the bar Customer-made products for accurate and easy use could also be supplied.
We are manufacturers of various sizes of binding wire. -
We are manufacturers of various sizes of binding wire. -
Metal cable tray hot dip galvanization Metal cable tray with epoxy coated surface -
Tension clamps are used to fix conductor and ground wire through insulators or link fitting to tower arms or substation structrues.In according to the clamp construction and mounting way,the clamps include three types as compression type, bolt type and wedge type.The compression type include hydraulic type and explosive type. 1. Strain clamps fix conductors and ground wires through insulators or link fittngs to tower arms or substation structures. 2. According to the aluminum alloy strain clamps construction and mounting way, the aluminum alloy strain clamps include two types: compression type and bolt type. 3. The Aluminum Alloy Strain Clamps (Compression Type ) include Hydraulic and explosive type. 4. As the Bolt Type Aluminum Alloy Strain Clamps are used to AAC and ACSR, the conductor may to wound by aluminum tapes or preformed armour rods for protecing these taps or rods are included in the diameter of suitable conductor.
Application: NXL Series strain clamp (wedge type)is suitable for distribution wire up to 10kV,fixing the aerial insulation aluminium conductor or naked aluminium conductor on the rotate angle or insulator of terminal strain pole, and then fixing and tighting the aerial conductor ,insulation cover and strain clamp are used together. Its action is insulation protection. Insulation cover performance feature 1,Withstand voltage: 18kV keep voltage one minute not break down 2,Insulation resistance: >1.0??1014?? 3,Environments temperature: -30~90 4,Weather proof performance: have good performanced after 1008 hours artifical climate aging test.
TRACEABLE DUCT RODDER containing metal lines, can be used to detect equipment easily detect the direction of the pipeline, as well as the location of the TRACEABLE DUCT RODDER . We can generate the TRACEABLE DUCT RODDER has two kinds, one is to be able to carry the monitoring function, one kind is the individual tracking function. The difference between the two is that with a probe into the function of a video wire inside, and a power cable, you can head the head to install the head, in order to view the situation in the pipeline. A bare copper wire can be used to locate and track the position of the TRACEABLE DUCT RODDER in a single probe function. The traceable duct rodders are available in 8mm-16mm diameter. Detectable duct rods are used to find, follow and accuratelymap the duct route without digging or trenching. The traceable duct rod is used in conjunction with both a signal transmitter and a receiver. The easily identifiable signal is transmitted along the entire length of the duct rod. The traceable duct rod has an 18 AWG copper wire, almost twice the size of the competition, in the center of the fiberglass core. The copper wire is also connected to the end fittings so the transmitter leads canmake a direct connection to the copper wire. The female end fitting provides the attachment point for the transmitter's lead connection. The other transmitter lead is connected to a stake driven into the earth. The direct connection of the signal to the copper wire provides themost effectivemethod of signal transmission.
Stainless steel big eye spring hook 1. Type:DIN5299,rigid eye snap hook,9 shaped spring hook,egg shaped spring hook,swivel eye snap hook,swivel head key snap hook,double head key snap hook,aluminium snap hook,big eye spring hook,swivel head clamp snap hook,open end spring hook, snap hook. 2. Material: Stainless Steel AISI 304,AISI 316,Carbon steelaluminium,copper,zinc alloy, ,. 3.Arts and crafts:casting,die casting,welded. 4.Surface: pickle or electrolysis and polish,hot dipped galvanized, electro galvanized, phosphated and self-colored, nickel palted,chromium plated etc. 5. Special specifications can also be produced according to drawing and sample. We are a leading rigging hardware manufacturer in China, with an annual output of 10 million pieces weighing more than 2,000 tons. We specialize in the production of various types of rigging hardware, stainless steel products, accessories of outdoor activities and pieces of metal stamping parts in various fields. The main products cover shackles, turnbuckles, thimbles, wire rope clips, hooks, snap hooks, quick links, eye nuts, eye bolts, chain accessories and swing accessories. There are over 10 categories, more than 2000 kinds of specifications (including stainless steel rigging).
Specs: Material:Stainless Steel Finish: Tembling Ploished Advantage: A = 5/8" B = 2-13/16" C = 4" D = 7/8" Work Load: 300KG Break Strength: 3250 PA Easy to thread and has a spring loaded feature
Model No.: SG-01 Bottom Patch Material: iron, aluminum, stainless steel Glass thickness: 10mm - 12mm Finish: satin (SSS), polished (PSS) Product Feature: With great function and nice shape perfectly fit into the decoration. To adopt the advanced die-casting technology. To sue high grade stainless steel or aluminum alloy cover. Anti-burglary, after 500,000 cycle times test. There is barely any damage of the parts and still function in good condition. We have the reward from china's authorities. High strength die-casting alloy body, safe and durable. Assort the SS body which has high melting point be pressed fill. Special type gasket which can resist oxidation. Product Description Stainless Steel Glass Door Patch Fitting SG-01 Cover material 201stainless steel / 304stainless steel Die -casting body material aluminium alloy Insert head material 201 stainless steel Cover thickness 0.8mm/1.0mm Glass thickness glass door 10-12mm Available for Glass Door Floor Spring Finish Satin/Polish Packing 20 pcs/carton Brand Can be customized
Introduction Our company produces Duct Rodders has 12 years of history, we generate different diameter of Duct Rodders, diameter range from 3mm to 15mm length of 15mm.Duct Rodders, 60m, 100m, 150m, 180m and a variety of specifications, of course also can according to the customer need to customize the length. The color of the rod is divided into white, yellow, orange, blue, black, green, red, we on the rod make m the number of markers, and can be used for the customers in the rod marker customers trademarks. We can provide a variety of Duct Rodders cage style, in order to meet the needs of customers in different countries. Product introduction The rod WanQi rods are manufactured from state-of-the-art materials formulated to offer the high performance & durability demanded by our customers.The core of the rod is manufactured by the pultrusion process. This involves impregnating high strength continuous glass fiber filaments with a liquefied resin. The fibers are drawn in to a heated die where the resin matrix is cured, bonding the fibers together and allowing mechanical loads to be transmitted through the matrix and distributed amongst the fibers.The resulting pultruded rod combines both the high stiffness required to push the rod through long distances of ducting, with the flexibility to handle tight bends without damage. This inner core is then coated with a highly durable, scratch resistant polypropylene sheath which protects the core from mechanical damage. The frames Frames are also a feature of the Hunter systems. a larger footprint for stability; steel brake handles that will last forever; dual rod out-feeding positions and wheels inside the frame width. The two smallest sizes feature frames with the feedout built into the handle. All frames can be laid down on either side. These are just some of the design features that will make every unit more usable and friendly for the end user. Rod selectIon Which is the right rod diameter for any given application? The rod selection is usually governed by several factors including: The size of ducting it is to be pushed through The distance the rod is to be pushed The number and tightness of bends in the ducting If the ducting is already occupied by cable When being pushed through the duct, any rod will tend to form “sine waves”, hitting the wall of the duct at certain intervals. Each time the rod comes in contact with the wall of the duct, it causes friction. The friction will build and eventually prevent the rod from being pushed any further. Small rod in large duct will make more frequent contact with the ducting; the same rod in smaller duct will make less frequent contact and therefore less friction so it can be pushed further. Large rod in small ducting is a good situation, but reduced flexibility of the rod may cause increased friction in the tighter bends.
Product introduction: Cable Joint as an important connection point of the whole power supply network, its running stability will directly affect the quality of the power supply system. Because the cable joint is made artificially in the on-site installation is complete, the environment affected by the construction and operation of the environment, will inevitably cause the error of installation, external damage, cable breakdown caused by explosion and water etc. And in the Cable Joint breakdown and explosion will release a lot of energy, the surrounding power facilities or personnel to cause harm, or even cause the occurrence of the two accident. To solve these problems, our company developed with fire prevention, waterproof, explosion-proof function Scotchcast Resin Cable Joints, all-round protection, once the explosion or breakdown of cable joints, can effectively protect the surrounding power facilities and other personnel, prevent the occurrence of two damage. Technical characteristics: 1, the shell is made of Scotchcast Resin, Scotchcast Resin are anisotropic materials, coupled with the formula and additives in a wide range of selectivity, glass steel according to the work environment and the state, adding special flame retardant additives, the glass steel material with good flame retardancy, the main parameters of flame retardant oxygen index should reach 62.5%. A high-quality composite glass steel, it has a special function to prevent acid, alkali, salt, oil and other corrosive media, and will not rust. The coastal areas and chemical sites and long buried underground requirements. Product performance to ensure that accessories can be a long time stable operation. 2, in the combination of Scotchcast Resin Cable Joints with silicone rubber sealing ring to seal the shell, enhance the waterproof performance of the cable intermediate joint. 3, with a strong pressure performance, Scotchcast Resin Cable Joints can withstand the impact from the internal or external. 4, in the Scotchcast Resin Cable Joints side of a sealing plug sealed with silicone rubber discharge hole, and discharge hole direction can be adjusted, once the cable joint explosion, discharge hole on the sealing plug can be quickly opened and can effectively prevent the other cables, or the surrounding environment destruction, flame retardant properties of the shell is also can guarantee the internal flame extinguished due to hypoxia. 5, convenient and quick installation, can meet the requirements of 10kV, 35kV single core and three core cable laying. 6, safe and reliable, widely used in electric power, coal, chemical industry and other high-risk industries and key projects of power supply network.
Product introduction: Cable Joint as an important connection point of the whole power supply network, its running stability will directly affect the quality of the power supply system. Because the cable joint is made artificially in the on-site installation is complete, the environment affected by the construction and operation of the environment, will inevitably cause the error of installation, external damage, cable breakdown caused by explosion and water etc. And in the Cable Joint breakdown and explosion will release a lot of energy, the surrounding power facilities or personnel to cause harm, or even cause the occurrence of the two accident. To solve these problems, our company developed with fire prevention, waterproof, explosion-proof function Scotchcast Resin Cable Joints, all-round protection, once the explosion or breakdown of cable joints, can effectively protect the surrounding power facilities and other personnel, prevent the occurrence of two damage. Technical characteristics: 1, the shell is made of Scotchcast Resin, Scotchcast Resin are anisotropic materials, coupled with the formula and additives in a wide range of selectivity, glass steel according to the work environment and the state, adding special flame retardant additives, the glass steel material with good flame retardancy, the main parameters of flame retardant oxygen index should reach 62.5%. A high-quality composite glass steel, it has a special function to prevent acid, alkali, salt, oil and other corrosive media, and will not rust. The coastal areas and chemical sites and long buried underground requirements. Product performance to ensure that accessories can be a long time stable operation. 2, in the combination of Scotchcast Resin Cable Joints with silicone rubber sealing ring to seal the shell, enhance the waterproof performance of the cable intermediate joint. 3, with a strong pressure performance, Scotchcast Resin Cable Joints can withstand the impact from the internal or external. 4, in the Scotchcast Resin Cable Joints side of a sealing plug sealed with silicone rubber discharge hole, and discharge hole direction can be adjusted, once the cable joint explosion, discharge hole on the sealing plug can be quickly opened and can effectively prevent the other cables, or the surrounding environment destruction, flame retardant properties of the shell is also can guarantee the internal flame extinguished due to hypoxia. 5, convenient and quick installation, can meet the requirements of 10kV, 35kV single core and three core cable laying. 6, safe and reliable, widely used in electric power, coal, chemical industry and other high-risk industries and key projects of power supply network.
Product introduction: Cable Joint as an important connection point of the whole power supply network, its running stability will directly affect the quality of the power supply system. Because the cable joint is made artificially in the on-site installation is complete, the environment affected by the construction and operation of the environment, will inevitably cause the error of installation, external damage, cable breakdown caused by explosion and water etc. And in the Cable Joint breakdown and explosion will release a lot of energy, the surrounding power facilities or personnel to cause harm, or even cause the occurrence of the two accident. To solve these problems, our company developed with fire prevention, waterproof, explosion-proof function Scotchcast Resin Cable Joints, all-round protection, once the explosion or breakdown of cable joints, can effectively protect the surrounding power facilities and other personnel, prevent the occurrence of two damage. Technical characteristics: 1, the shell is made of Scotchcast Resin, Scotchcast Resin are anisotropic materials, coupled with the formula and additives in a wide range of selectivity, glass steel according to the work environment and the state, adding special flame retardant additives, the glass steel material with good flame retardancy, the main parameters of flame retardant oxygen index should reach 62.5%. A high-quality composite glass steel, it has a special function to prevent acid, alkali, salt, oil and other corrosive media, and will not rust. The coastal areas and chemical sites and long buried underground requirements. Product performance to ensure that accessories can be a long time stable operation. 2, in the combination of Scotchcast Resin Cable Joints with silicone rubber sealing ring to seal the shell, enhance the waterproof performance of the cable intermediate joint. 3, with a strong pressure performance, Scotchcast Resin Cable Joints can withstand the impact from the internal or external. 4, in the Scotchcast Resin Cable Joints side of a sealing plug sealed with silicone rubber discharge hole, and discharge hole direction can be adjusted, once the cable joint explosion, discharge hole on the sealing plug can be quickly opened and can effectively prevent the other cables, or the surrounding environment destruction, flame retardant properties of the shell is also can guarantee the internal flame extinguished due to hypoxia. 5, convenient and quick installation, can meet the requirements of 10kV, 35kV single core and three core cable laying. 6, safe and reliable, widely used in electric power, coal, chemical industry and other high-risk industries and key projects of power supply network.
Product introduction: Cable Joint as an important connection point of the whole power supply network, its running stability will directly affect the quality of the power supply system. Because the cable joint is made artificially in the on-site installation is complete, the environment affected by the construction and operation of the environment, will inevitably cause the error of installation, external damage, cable breakdown caused by explosion and water etc. And in the Cable Joint breakdown and explosion will release a lot of energy, the surrounding power facilities or personnel to cause harm, or even cause the occurrence of the two accident. To solve these problems, our company developed with fire prevention, waterproof, explosion-proof function Scotchcast Resin Cable Joints, all-round protection, once the explosion or breakdown of cable joints, can effectively protect the surrounding power facilities and other personnel, prevent the occurrence of two damage. Technical characteristics: 1, the shell is made of Scotchcast Resin, Scotchcast Resin are anisotropic materials, coupled with the formula and additives in a wide range of selectivity, glass steel according to the work environment and the state, adding special flame retardant additives, the glass steel material with good flame retardancy, the main parameters of flame retardant oxygen index should reach 62.5%. A high-quality composite glass steel, it has a special function to prevent acid, alkali, salt, oil and other corrosive media, and will not rust. The coastal areas and chemical sites and long buried underground requirements. Product performance to ensure that accessories can be a long time stable operation. 2, in the combination of Scotchcast Resin Cable Joints with silicone rubber sealing ring to seal the shell, enhance the waterproof performance of the cable intermediate joint. 3, with a strong pressure performance, Scotchcast Resin Cable Joints can withstand the impact from the internal or external. 4, in the Scotchcast Resin Cable Joints side of a sealing plug sealed with silicone rubber discharge hole, and discharge hole direction can be adjusted, once the cable joint explosion, discharge hole on the sealing plug can be quickly opened and can effectively prevent the other cables, or the surrounding environment destruction, flame retardant properties of the shell is also can guarantee the internal flame extinguished due to hypoxia. 5, convenient and quick installation, can meet the requirements of 10kV, 35kV single core and three core cable laying. 6, safe and reliable, widely used in electric power, coal, chemical industry and other high-risk industries and key projects of power supply network.
Product introduction: Cable Joint as an important connection point of the whole power supply network, its running stability will directly affect the quality of the power supply system. Because the cable joint is made artificially in the on-site installation is complete, the environment affected by the construction and operation of the environment, will inevitably cause the error of installation, external damage, cable breakdown caused by explosion and water etc. And in the Cable Joint breakdown and explosion will release a lot of energy, the surrounding power facilities or personnel to cause harm, or even cause the occurrence of the two accident. To solve these problems, our company developed with fire prevention, waterproof, explosion-proof function Scotchcast Resin Cable Joints, all-round protection, once the explosion or breakdown of cable joints, can effectively protect the surrounding power facilities and other personnel, prevent the occurrence of two damage. Technical characteristics: 1, the shell is made of Scotchcast Resin, Scotchcast Resin are anisotropic materials, coupled with the formula and additives in a wide range of selectivity, glass steel according to the work environment and the state, adding special flame retardant additives, the glass steel material with good flame retardancy, the main parameters of flame retardant oxygen index should reach 62.5%. A high-quality composite glass steel, it has a special function to prevent acid, alkali, salt, oil and other corrosive media, and will not rust. The coastal areas and chemical sites and long buried underground requirements. Product performance to ensure that accessories can be a long time stable operation. 2, in the combination of Scotchcast Resin Cable Joints with silicone rubber sealing ring to seal the shell, enhance the waterproof performance of the cable intermediate joint. 3, with a strong pressure performance, Scotchcast Resin Cable Joints can withstand the impact from the internal or external. 4, in the Scotchcast Resin Cable Joints side of a sealing plug sealed with silicone rubber discharge hole, and discharge hole direction can be adjusted, once the cable joint explosion, discharge hole on the sealing plug can be quickly opened and can effectively prevent the other cables, or the surrounding environment destruction, flame retardant properties of the shell is also can guarantee the internal flame extinguished due to hypoxia. 5, convenient and quick installation, can meet the requirements of 10kV, 35kV single core and three core cable laying. 6, safe and reliable, widely used in electric power, coal, chemical industry and other high-risk industries and key projects of power supply network.
Product introduction: Cable Joint as an important connection point of the whole power supply network, its running stability will directly affect the quality of the power supply system. Because the cable joint is made artificially in the on-site installation is complete, the environment affected by the construction and operation of the environment, will inevitably cause the error of installation, external damage, cable breakdown caused by explosion and water etc. And in the Cable Joint breakdown and explosion will release a lot of energy, the surrounding power facilities or personnel to cause harm, or even cause the occurrence of the two accident. To solve these problems, our company developed with fire prevention, waterproof, explosion-proof function Scotchcast Resin Cable Joints, all-round protection, once the explosion or breakdown of cable joints, can effectively protect the surrounding power facilities and other personnel, prevent the occurrence of two damage. Technical characteristics: 1, the shell is made of Scotchcast Resin, Scotchcast Resin are anisotropic materials, coupled with the formula and additives in a wide range of selectivity, glass steel according to the work environment and the state, adding special flame retardant additives, the glass steel material with good flame retardancy, the main parameters of flame retardant oxygen index should reach 62.5%. A high-quality composite glass steel, it has a special function to prevent acid, alkali, salt, oil and other corrosive media, and will not rust. The coastal areas and chemical sites and long buried underground requirements. Product performance to ensure that accessories can be a long time stable operation. 2, in the combination of Scotchcast Resin Cable Joints with silicone rubber sealing ring to seal the shell, enhance the waterproof performance of the cable intermediate joint. 3, with a strong pressure performance, Scotchcast Resin Cable Joints can withstand the impact from the internal or external. 4, in the Scotchcast Resin Cable Joints side of a sealing plug sealed with silicone rubber discharge hole, and discharge hole direction can be adjusted, once the cable joint explosion, discharge hole on the sealing plug can be quickly opened and can effectively prevent the other cables, or the surrounding environment destruction, flame retardant properties of the shell is also can guarantee the internal flame extinguished due to hypoxia. 5, convenient and quick installation, can meet the requirements of 10kV, 35kV single core and three core cable laying. 6, safe and reliable, widely used in electric power, coal, chemical industry and other high-risk industries and key projects of power supply network.
Product introduction: Cable Joint as an important connection point of the whole power supply network, its running stability will directly affect the quality of the power supply system. Because the cable joint is made artificially in the on-site installation is complete, the environment affected by the construction and operation of the environment, will inevitably cause the error of installation, external damage, cable breakdown caused by explosion and water etc. And in the Cable Joint breakdown and explosion will release a lot of energy, the surrounding power facilities or personnel to cause harm, or even cause the occurrence of the two accident. To solve these problems, our company developed with fire prevention, waterproof, explosion-proof function Scotchcast Resin Cable Joints, all-round protection, once the explosion or breakdown of cable joints, can effectively protect the surrounding power facilities and other personnel, prevent the occurrence of two damage. Technical characteristics: 1, the shell is made of Scotchcast Resin, Scotchcast Resin are anisotropic materials, coupled with the formula and additives in a wide range of selectivity, glass steel according to the work environment and the state, adding special flame retardant additives, the glass steel material with good flame retardancy, the main parameters of flame retardant oxygen index should reach 62.5%. A high-quality composite glass steel, it has a special function to prevent acid, alkali, salt, oil and other corrosive media, and will not rust. The coastal areas and chemical sites and long buried underground requirements. Product performance to ensure that accessories can be a long time stable operation. 2, in the combination of Scotchcast Resin Cable Joints with silicone rubber sealing ring to seal the shell, enhance the waterproof performance of the cable intermediate joint. 3, with a strong pressure performance, Scotchcast Resin Cable Joints can withstand the impact from the internal or external. 4, in the Scotchcast Resin Cable Joints side of a sealing plug sealed with silicone rubber discharge hole, and discharge hole direction can be adjusted, once the cable joint explosion, discharge hole on the sealing plug can be quickly opened and can effectively prevent the other cables, or the surrounding environment destruction, flame retardant properties of the shell is also can guarantee the internal flame extinguished due to hypoxia. 5, convenient and quick installation, can meet the requirements of 10kV, 35kV single core and three core cable laying. 6, safe and reliable, widely used in electric power, coal, chemical industry and other high-risk industries and key projects of power supply network.
