En 473 Non-DestructiveTesting-Qualification And Certification Of NDT Personnel-General principles.
EN 473无损测试人员认证和证书——通用标准。
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Babcock International has developed a new non-destructivetesting (NDT) technique for naval ship tailshafts that could reduce assessment time from 18 weeks to one month.
Test specimens shall be taken after all non-destructivetesting (NDT) has been carried out and which has passed the relevant inspection criteria for the NDT method(s) used.