工芸基礎知識（選択問題）20180503
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この投稿は、最後にHP0377によって2018年5月3日12時12分に編集されました。工程の基礎知識（選択問題）20180503：3級以上の遠心ポンプにおいて、各段階で用いられるエネルギー変換装置について。 A.渦殻 B.ガイドホイール C.AまたはB D.A+B
A~~~~~~~~~~~
ガンはDです
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