工芸基礎知識（選択問題）20180408
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水環ポンプは作動時に。 A. 定期的な給水 B. 継続的な給水 C. 給水不要 D. AまたはB ヒント：ウォーターリングポンプの作動水は排気時に失われ、同時に大きな乱流が生じて発熱する。
水環ポンプの運転時はBでなければなりません。 A. 定期的な水分補給 B. 継続的な水分補給 C. 水分補給不要 D. AまたはB
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