... easy to handle with high mobility .This series of tongs can be connected to computer comtrolling units ... surface operations in oil fields.National Invention Patent of the tong has been got .The tongs ... ultimate data ,such as :torque ,number of ciccles ,torque/time of .circles,torque/time. curves,date,time, ... joint in the best condition . -You can choose the type writer to record all the data and ...