... variours railway maintenance equipments in China.. Products include rail cutter, rail grinder, rail drilling machine, track lifting and lining machine, railway ... a very high reputation. JGB-20 typeEngine driven hook-head wrenchManualone,Applying scope It's suitable for installing & dismounting ... ,engine rev.: 3600r/min 4,rated thrust: 20KN5,top head QTY.: 26,working efficiency: ≤4sec/one piece7,weight; ...