API 16A Annular Bop, Mud Gate Valve, Plug Valve manufacturer / supplier in China, offering API 6A Oilfield Drilling X-Mas Tree Christmas Tree, API Spec 6A Cross Assembly All Studded 4 Ways with Gasket, Steel Grooved Pipe Fitting Fire Protection FM for UL Fire Fighting Elbow Flange Reducing Tee and Flexible/Rigid Coupling and so on.