游客 211.161.27.x 发表于 2017-5-19 10:39 A 按8.5.7条降低一级的是框架柱 不是偏心支撑 所以3错 降低一级后的框架柱是三级按8.3.1条100X根号下235/ ...
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手机版|小黑屋|第一证书
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