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五用异径接头是我局李金才班长把安全锁接头（即反事故接头）和钻杆排水接头的构造作用原理，综合在异径接头上面（构造如图）而制成
Five different diameter connector is my bureau Li Jincai squad to the safety lock connector (ie, anti-accident joints) and the construction of the drill pipe joint action principle, integrated on the different diameter joints (structure shown) and made