pipe thread造句

1、Pipe Thread Specification itself with old English system has unreasonable factors.
旧英制管螺纹标准本身存在不合理因素。

2、The program is to process all kinds of oil well pipe thread and casing coupling.
该项目是加工各类油井管螺纹、套管接箍的机械加工项目。

3、Second, the electric submersible pump connected to the pipe thread pretightening force enough.
第二，电潜泵各管螺纹联接的预紧力不够（或预紧扭矩不够）。