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2017年4月30日の練習**質問、回答には 2 ~ 6 ポイントが加算されます (**上映後の評価はつきません、ご返信ありがとうございます

2017-04-30View Original

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選択問題:加熱炉の燃料油として残油を使用する場合、運転時に燃料油を循環させる適切な時間は(A)です。 A. コールドサイクル中 B. 加熱炉点火時 C. 加熱およびサイドライン開放時 D. 吊上能力調整時

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