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
熔嵌环。
自耗的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
熔嵌环。
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