Hot Tapping Machine, Line Stop Machine, Sandwich Valve manufacturer / supplier in China, offering 700mm 6.4MPa Hydraulic Hot Tapping Machine for Wate Oil and Gas Pipeline, 3000mm 120'' 64/100 Bar Hydraulic Hot Tapping Machine for Oil Gas Pipeline, 10.0MPa 900mm Hydraulic Hot Tapping Machine for Oil and Gas Pipeline and so on.