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工芸基礎知識(選択問題)20180607

2018-06-07View Original

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この投稿は、2018年6月7日08:10にHP0377によって最終的に編集されました。以下の種類のポンプの中で、耐気穴作用性能が最も悪いのはです。 A.歯車ポンプ B.スクリューポンプ C.渦巻きポンプ D.ウォーターリングポンプ
Reply #22018-06-07
cを選びます。投稿者に正解を教えてほしいです
Reply #32018-06-07
ガンはDです

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