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誰か説明してくれない?

2019-09-14View Original

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南北方向の地上の公共エリアにある配管の識別マークは、沿線にある道路下の涵洞の()に設置されている。
Reply #22019-09-14
両側でも、他でも、私にはできない
Reply #32019-09-14
東側;南側;西側;北側 答えは南側
Reply #42019-09-14
北側でもいいよ、こんなつまらない問題に技術的な難しさなんてあるわけない

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