【毎日一問】工程基礎知識（選択問題）20200123
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この投稿は最後にHP0377によって2020-1-23 07:26に編集されました。炉を320℃に保ち、24時間間持続させる目的はです。 A、炉壁内の残留水分を除去する B、壁内の結晶水を除去する C、炉壁を焼結させる D、汚れを除去する|
答えを探さない限り、壁内の結晶水を除くと思います
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