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無油膨張接合とは何ですか？管程側とは具体的にどの部分を指すのでしょうか？達人にご指導いただけますでしょうか。
1. パイプ拡張時、拡張ツールはディーゼル油、キャンドルオイル、ガソリンなどの油類と接触しない。 2. 管側とは、管の内部を流体が流れる領域のことです
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