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判断問題：U字管式熱交換器は、まず管側で圧力試験を行い、その後ケーシング側で圧力試験を行う ( )
間違っている、×~~~~~~~~
U字管式熱交換器は、まず管側で圧力試験を行い、その後ケーシング側で圧力試験を行う（誤り）
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