1.Manual Tongs 2.Type WWC 3.Q2 3/8~10 3/ ... . GB/T 28001-2001 5.SY/T 5035-2004 The manual tongs are designed and manufactured in accordance with the National ... Gas Industry SY/T 5035-2004"Manual Tongs, Elevator links ,Elevator " which is a useful tool applied to make up and break ... drill pipe, joint, casings,casing hoops etc. When raise drill tool up and fall it down. Changing lug jaws and handling ...