工芸基礎知識（選択問題）20180519
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この投稿は最終的にHP0377によって2018年5月19日08:29に編集されました。工程基礎知識（選択問題）20180519 渦巻きポンプの使用管理時①排出口バルブを閉じて起動する；②節流法で流量を調整してください、判断してください。 A.①正解 B.②正解 C.①と②どちらも正解 D.①と②どちらも不正解
D. ①も②も間違っている
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