We supply metal structural bleacher system that suitable ourdoor, telescopic seating system, bleacher seating, stadium seating, stadium seating chairs.According to customer requirement, and depend on the site condition we supply 5 kinds of metal structural bleacher system, and 2 kinds of telescopic seating system
He second type is the 24-plate(abridged) edition used principally at factories and offices of transportation and other concered places of the purpose of conducting usual sample survery for color deficiency in a short space of time when hiring new employees.
The ishihara`s tests for colour deficency consist of four(4)different types, namely, the first type is the 38-plat(completed). The ishihara`s tests for colour deficency consist of four(4)different types, namely, the first type is the 38-plate(complete) edition, used principally by ophthalmologists in order to classify completely the bype of color dificiency. The second type is the 24-plate(abridged) edition used principally at factories and offices of transportation and other concered places of the purpose of conducting usual sample survery for color deficiency in a short space of time when hiring new employees. The third type is the 14-plate (concised)edition. On the average, charts of highest accuracy were selected from the 38 plate(complete) edition to conduct minimum examinations of color deficiency. The forth type is the 10-plate for unlettered persons edition or the test for colour deficiency for infants. Ishihara test :labware tech have stocks of 38 plate ishihara test chart books, for color deficiency: 38 plate book, price is usd170 each .
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