nonconsumable

nonconsumable electrode

自耗电极

nonconsumable melting

自耗的熔炼

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杆、熔化性嵌条和不可熔嵌环。