Procedures require the identity, formal stamp and signature of level III NDE engineer as well as the date of validity.
程序需要的身份，正式图章和III级无损检测工程师签名以及有效日期。
Procedures require the identity, formal stamp and signature of level III NDE engineer as well as the date of validity.
程序需要的身份，正式图章和III级无损检测工程师签名以及有效日期。
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