DW series of outer single hydraulic prop is constant impedance pillar,with the strong support,the resistance stability etc.

DW series of outer single hydraulic prop is constant impedance pillar,with the strong support,the resistance stability, rise column fast, large quantity work, simple structure, assembly and disassembly convenient, easy to maintain, secure, reliable, and so on. 

The products together with metal roof beam used as the colliery stope roof beam shoring, also can used as comprehensive mechanized stope end shoring or temporary shoring. 

DW series of outer single hydraulic prop