insert ring造句

例句与造句

1. 7 permanent weld backing bars , consumable inserts and nonconsumable insert rings are not permitted without prior written approval from secco
   事先没有赛科公司的书面批准，不允许有永久焊接的支撑杆、熔化性嵌条和不可熔嵌环。
2. It's difficult to find insert ring in a sentence. 用insert ring造句挺难的