The original ASNT Recommended Practice SNT-TC-1A was published in October 1966 and was not revised except editorially until June 1975.
最早ASNT实施细则SNT-TC-1A是1966年发布。除了辑上错误,直至1975年6月未经任何修改。
The original ASNT Recommended Practice SNT-TC-1A was published in October 1966 and was not revised except editorially until June 1975.
最早ASNT实施细则SNT-TC-1A是1966年发布。除了辑上错误,直至1975年6月未经任何修改。
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