要求无损检测的可靠性，就必须对无损检测人员进行规定的培训和资格鉴定。
Reliability requirements of NDT have made it necessary for those performing NDT's to be trained specifically and qualified for their tasks.
要求无损检测的可靠性，就必须对无损检测人员进行规定的培训和资格鉴定。
Reliability requirements of NDT have made it necessary for those performing NDT's to be trained specifically and qualified for their tasks.
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