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接触コーキング改質油ブレンドバージョン 20190803

2019-08-03View Original

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参加する:賞品 1 フォーチュン;正解:賞品 3 富。 https://bbs.hcbbs.com/static/image/hrline/2.gif https://bbs.hcbbs.com/static/image/hrline/3.gif 本当か間違っているかの質問:給水が脱酸素された後は、PH 値が腐食に重要な役割を果たします。 PH値が小さいほど腐食性が高いことを意味します。 答え: 正しい https://bbs.hcbbs.com/static/image/hrline/1.gif https://bbs.hcbbs.com/static/image/hrline/2.gif 注記:答えは2日後に自動的に発表されます。

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