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【毎日一題 第201題】2019年7月20日

2019-07-20View Original

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【毎日一問 第201問】2019年7月20日 一般的な新しい配管では、蒸気を使用する前に配管の予熱試験を行い、配管が加熱によって膨張することを確認する必要があります。 判断問題() 2日以内に解答してください。

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