酸洗いとパッシベーションは必要ですか？
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ステンレス製インペラのポンプでは、インペラは必ず酸洗いと不動態処理を行う必要がありますか？
媒体は過酸化水素で、酸洗いが必要です。具体的には媒体の状態を見なければならない
何を輸送しているのか見てみる必要があるのでしょうか？
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