短语词组短语bell end of plpe 承插端sometimes bell end 承口indeed bell end 承口continually bell end 承口bell end pipe 台锥管形;承插管bell and plain end joint 平接;翻译;平接英语;一端扩口end bell 油缸端盖;端承口cable end bell 电缆锥形尾端large end bell [建]大头承口 返回 bell end