permanent backing 中文意思是什麼
permanent backing
解釋
永久墊板-
Theuse of permanent backing bars in highly stressed welds in hullstructures is to be avoided as far as possible
例2 :船體結構中,凡承受高應力的焊縫,應盡量避免採用固定墊板連接。 -
7 permanent weld backing bars, consumable inserts and nonconsumable insert rings are not permitted without prior written approval from secco
事先沒有賽科公司的書面批準,不允許有永久焊接的支撐桿、熔化性嵌條和不可熔嵌環。
分享友人