... isinsisted of driving clamp, backup clamp, machine body, torque testing device, hydraulicpower supply, electric control system and computer ... system.In screwing on, thedouble-pump change speed automatically, screwing on in high-speed, torque on inlow speed, not only ... (see table) , one manual instruction, one pressure - torque table. model specificationYNJX-230/20 Application23/8"-27/8"-31 ...