英语语法分析

Sectionally pressing and assembled weld technology of front disc on fan impeller is introduced.

介绍了对风机叶轮前盘采用分段压型和组焊的工艺方案以及制造工艺的过程。

If the cable should be used sectionally, the head of the cable must be sealed in order to prevent water intake.

电缆如果需要分段使用，电缆分段后必须用防水封帽将电缆头密封，防止进水。

I remember spending a lot of time designing the project sectionally, yet I don't have any drawings showing a section slice through the site.

我记着当时花费了很多的时间来设计建筑的剖面图，但是却没有任何图纸展示了剖面图。