API 16A Annular Bop, Mud Gate Valve, Plug Valve manufacturer / supplier in China, offering API6a Cameron Choke Valve /Positive Chokes/Adjustable H2 Chokes, API 6A Chiksan Swivel Joints Fmc Chiksan Rotules 1502 Weco Flow Iron, API Quick Latch Single and Double Plug Cementing Head for Oil Well Cementing and so on.