... , we welcome customers to visit our factory. coal mine hydraulic single prop Name Category1) Truck partsfront axle, balance shaft2) ... boat shaft3) forging productforing ring, forging bar,discs4) Sole hydraulic support with patentmining tunnel prop Feature 1) Low labour cost ... Device 1) 20 Ton total hydraulic die hammer machine 2) 2 Ton total open hydraulic hammer machine 3) 1600 Ton Friction ...