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工芸基礎知識(選択問題)20171215

2017-12-16View Original

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ポンプの作動圧力の用途は、それではありません。 A. 吸排管路の抵抗を克服する B. ポンプ内に真空を作る C. 吸排液面の圧力差を克服する D. 液体を一定の高さまで上昇させる
Reply #22017-12-17
ポンプの作動圧力の用途はBではありません。 A. 吸排管路の抵抗を克服する B. ポンプ内に真空を作る C. 吸排液面の圧力差を克服する D. 液体を一定の高さまで上昇させる

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