proof firing造句

例句与造句

1. One of these guns was destroyed when it suffered a premature detonation during Proof Firing.
2. The proof firing also served to expand the new tube slightly and ensure a tight fit in the old iron tube.
3. The gun was then rifled with 3 grooves, with a uniform twist of 1 turn in 40 calibres ( i . e . 1 turn in 252 inches ), and proof fired.
4. It's difficult to find proof firing in a sentence. 用proof firing造句挺难的