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CAD図面にあるC.S.Oとは何ですか?

2019-06-18View Original

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CAD図でバルブの横にC.S.Oと書かれているのを見かけましたが、凡例にも説明がなく、先生方、これはどういう意味でしょうか?
Reply #22019-06-18
CSO(car sealed open)の封印が解かれている――許可なく閉じてはならない; CSC(カー・シールド・クローズド)鉛封関——許可なく開封してはならない。
Reply #32020-03-09
GB50316の用語解説ですが、どのような作業条件で使用されるかご存知ですか?

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