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工芸基礎知識(選択問題)20180502

2018-05-02View Original

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この投稿は最後にHP0377によって2018-5-2 12:11に編集されました。工程基礎知識(選択問題)20180502:遠心ポンプのソフトパッキンケーション内に設置されているH字断面の金属製リングのことを呼びます。 A. 密封リング B. 水封リング C. 口金リング D. 漏れ防止リング
Reply #22018-05-02
ガンはCです

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