Spot check of N. D. T. performed by supplier.

对供应商的无损检测过程进行抽查。

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Spot check of N. D. T. performed by supplier.

察觉，发现，检测：侦查的行动或过程；

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Spot check of N. D. T. performed by supplier.

察觉，发现，检测：侦查的行动或过程；

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