weldment造句

1、Special welding equipment must be developed, to achieve Cu-Al pipe weldment in high quality.
为实现铜-铝管的优质焊接，需要研制相应的焊接设备。

2、It is more usual to complete the weldment first and then to galvanize it.
所以常用的方法是先把钢板焊起来再镀锌。

3、The application of weldment and its economic efficiency is also described.
并阐述了焊接件的应用及其经济效益。