... With double top head, it can install two pieces of elastic fastenings at the same time, featuring high working efficiency, ... accurate installation, focus control, easy operation. It’s an indispensable device used in railway overhaul and rail replacing ... 4,rated thrust: 20KN5,top head QTY.: 26,working efficiency: ≤4sec/one piece7,weight; 219kg8,overall dimension: 1960 ...