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2017 年 12 月 10 日の多肢選択式質問。返信は 0 点から 6 点まで採点できます(投稿から 1 日経ってからの返信は得点されません。ご返信ありがとうございます。)

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減圧供給部では主に__により中程度の腐食が発生します。(通常および真空装置) (1) H2S-H (4)-H2O (2) エロージョン (3) 高温硫黄、ナフテン酸 (4) なし 答え: ()

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