Hydraulic single ram is well control equipment most has the security products Accord with API standard        Hydraulic single disc the bop instruments have remote control device, and convenient operation, switching speed, is what happened when chung...

Accord with API standard With its anti top and bearing two functions Size is larger, achieve 186mm Tubing can smoothly thr            Wedge type universal carvalho is mainly used in oil field with pressure homework device and...

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