weld backing meaning in English
捍缝垫
焊缝背衬垫
焊缝衬垫
焊接衬垫
Examples
- 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。
捍缝垫
焊缝背衬垫
焊缝衬垫
焊接衬垫