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關(guān)注：1
2013-05-23 12:21
求翻譯：when concrete is properly made and has been allowed to harden for a sufficient length of time是什么意思？ 待解決
 懸賞分：1
- 離問題結(jié)束還有
when concrete is properly made and has been allowed to harden for a sufficient length of time
問題補(bǔ)充： |
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