feausres:
mechanical structure 
1.Post widened to 280 mm,guarantee the pillar strength.
2.Block high strength pipe, deformation in 10 years.
3.The whole sliding body without seam type, and equipped with protection.
4.Sliding body plus nylon block(with lubrication function)
5.Enhanced drawing board double arm, widely applicable model.
6.Balance wire rope use double fracture resistance design and high strength alloy steel stranded wire and steel core, after the pre-tension technology.
Drive mode
Hydraulic double cylinder/chain traction/ rope balance. 
safety unlock pattern
Adopt bilateral overhead type unlocked system/manual dropdown,easy stretch/prevent unlock rope in block..
hydraulic/electrical system
1.Oil cylinder adopt the new rolling process cylinder/combined seal,double support guide and have high load under long stroke.
2.High quality hydraulic pump station, provide stable hydraulic supply(with overload protection)