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【毎日一問】工程基礎知識(選択問題)20200114

2020-01-14View Original

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起動前に出口弁を閉じ、出口弁で流量を調整しなければならないのはBです。 A、往復ポンプ B、遠心ポンプ C、渦巻きポンプ D、スクリューポンプ

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