短语词组短语tapered male thread 锥形阳螺纹tapered female thread 斜型母螺丝Tapered Pipe Thread 锥管螺纹接头external tapered thread 圆锥外螺纹inside tapered thread 内锥螺纹;内锥球螺纹Tapered thread connector -body 扩口式锥螺纹直通管接头体 返回 tapered thread