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關注：1
2013-05-23 12:21
求翻譯：Concrete density used is the density for reinforced concrete with aggregates of normal density and up to 2% reinforcement.是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
Concrete density used is the density for reinforced concrete with aggregates of normal density and up to 2% reinforcement.
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