Drill Pipe, Gate Valve, Petroleum Equipment manufacturer / supplier in China, offering High-Pressure API16A RAM Annular Drilling Bop & Parts 1200-1500 Psi, Reliable API16A RAM Annular Drilling Bop & Parts for Hydraulic Systems, API16A RAM Annular Drilling Bop & Parts for 2000-5000 Psi and so on.