工程フロー図の計装インターロックにおいて、SGNは何を意味するのでしょうか？
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題名の通り、例えばmccはマオダ制御センターです
信号接地？図をアップロードするのが最善です。
すべて英語の略語で、フルに書けば意味がわかります。
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