... no damage for pipe. Structure and features This hydraulic bucking machine adopts hyperboloid roller-climbing clamping mode.Two slope plates ... body structure and is insisted ofdriving clamp, backup clamp, machine body, torque testing device, hydraulicpower supply, electric control ... plate ,one teeth (seetable) , ome manual instruction, one pressure - torque table. itemO.D.(Applicable pipe)Jaw plate of ...