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關注：1
2013-05-23 12:21
求翻譯：the use of reinforced concrete became widespread for arch bridges and later for girder and rigid-frame bridges.是什么意思？ 待解決
 懸賞分：1
- 離問題結(jié)束還有
the use of reinforced concrete became widespread for arch bridges and later for girder and rigid-frame bridges.
問題補充： |
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