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毎日一問----------工程基礎知識 シングルクイズ(9月14日)

2017-09-14View Original

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参加すれば3の報酬がもらえます。単一選択問題:遠心ポンプを動かす前に必ず液体で満たす必要があるのは、 を防ぐためです。 選択肢:a、気束現象 b、キャビテーション現象 c、気化現象 d、気浮現象

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