830 . 自來水管線施工，有關「還土」之規定，何者為錯誤者？ (A) 填料以黏土為最佳 (B) 水管周圍 30 公分以內不得夾有石塊 (C) 要

問題詳情

830 . 自來水管線施工，有關「還土」之規定，何者為錯誤者？
(A) 填料以黏土為最佳
(B) 水管周圍 30 公分以內不得夾有石塊
(C) 要逐層夯實還填土
(D) 夯實密度要達 85% 以上。

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