【매일 주제】【토목판 20160611】
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참여 보상: 2재산.정답에 대한 보상: 9재산. 철근벽돌 보의 철근이 지지대까지 뻗는 거리는 ( ) 이상이어야 합니다. A、120mm B、240mm C、180mm D、200mmA、120mm B、240mm C、180mm D、200mm
A、120mm B、240mm C、180mm D、200mm
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