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2017 年 9 月 27 日の四肢選択式質問。返信は 0 点から 6 点で採点されます(投稿から 1 日経ってからの返信は採点されません。ご返信ありがとうございます。)

2017-09-27View Original

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潤滑油の安全性指標は、:__。 (1) 凝固点 (2) 引火点 (3) 自然発火点 答え: (2)

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