light weight, anti-corrosion, ease of operation, decrease work density, increase work efficiency DWB series portable hydraulic single prop is constant-resistance prop with hydraulic oil supply outside.as the ... VALVE RATED HYDRAULIC PRESSURE( MPa)3.83.83.83.83.8WEIGHT(kg)212222.52527DRIVING MEDIUMEMULSIFICATING FLUID,HYDROATATIC WATER DWB35-30/100 light-duty hydraulic single prop