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，
允许有永久焊接的支撑杆、熔化性嵌
可熔嵌
。
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，允许有永久焊接的支撑杆、熔化性嵌可熔嵌。
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代表本软件的观点；若发现问题，欢迎向我们指正。
