trailing shield造句

例句与造句

1. Trailing shields are also supplied to hold against the back side of welds, whether flat or radiused, in order to keep the joint free from oxidation and discolouration.
2. To improve weld purging on the front side of welds, a trailing shield can be attached to manual or automatic welding torches to follow behind as the weld is being made.
3. It's difficult to find trailing shield in a sentence. 用trailing shield造句挺难的