The original ASNT Recommended Practice SNT-TC-1A was published in October 1966 and was not revised except editorially until June 1975.
最早的ASNT推荐实施细则SNT-TC-1A
1966
布的。除了编辑
的错误，直至19756月未经任何修改。
;
;,确实;
不倚的;，彻底;The original ASNT Recommended Practice SNT-TC-1A was published in October 1966 and was not revised except editorially until June 1975.
最早的ASNT推荐实施细则SNT-TC-1A1966布的。除了编辑的错误，直至19756月未经任何修改。
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