1、Pipe Thread Specification itself with old English system has unreasonable factors.
舊英制管螺紋標準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.
該項目是加工各類油井管螺紋、套管接箍的機械加工項目。

3、Second, the electric submersible pump connected to the pipe thread pretightening force enough.
第二，電潛泵各管螺紋聯(lián)接的預緊力不夠（或預緊扭矩不夠）。

4、Pipe thread sealant tape;
管螺紋密封帶；

pipe thread翻譯