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【空調版】毎日一問20171215

2017-12-15View Original

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非金属製のUPVC排水管(ポリ塩化ビニル管)で一般的に用いられる接続方法は( )です。 A 溶接 B 接合・接着接続 C フランジ接続 D 結束接続 正解:B

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