الوصف

1.It is up to *5 years long life time
 
2.It is durable, recyclable and safety
 
3.Reasonable stress and large bearing capacity
 
4.Improve working efficiency and save labour power
 
5.Large and saftey operating areal
 
6.Keep exactly straight
 
7.Corrosion protection alternatives
 
8.Open thread and covered thread.
 
9.Adjustable telescopic, each having a series of maximum extended lengths and each having differing endplate configuration