High quality hydraulic prop

Introduction Of High quality hydraulic prop DN inner injection single hydraulic prop for the internal structure of the mine for the fluid hydraulic prop, mainly consist by the roof, ventilation valve, cylinder, live cylinder, piston, hand pump, unloading valves, safety valves and handles body and other component parts. DN inner injection single hydraulic prop plays a big role in the mine roadway support, get the acceptance and use of country's major coal mines customers , it