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4882| 6
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[建筑結(jié)構(gòu)] 當(dāng)采用強(qiáng)度等級(jí)400MPa(三級(jí)鋼)及以上鋼筋時(shí),混凝土強(qiáng)度等級(jí)不宜低于C25|關(guān)注本帖 |
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