The designed product targeted at the shortcoming of the single-arm akateboard-style combination saw structure on the current market. The main hydraulic transmission is very high-security with increase service life. The production precision is up to standard, the oiling filler is just once or twice in a day with column-oriented to maintain lubrication. It can reduce machine repaired, hydraulic accessories easy to purchase, do not cause inconvenience to the customer purchase. It is a good product to bring with.