1.API 6A 2.KQ65-60 KQ65-35 3.PSL1, PSL2,PSL3,PSL4 4.AA,BB, ... CC,DD,EE,FF 5.PR1,PR2 KY65~60 wellhead equipment ,is mainly used in oil extraction ,it consists ... ″ EUEConnecting Casing5 1/2″Connection TypeClamp Connector api 6e .KQ65-60 cherismas tree Equipment