safety classes of building structures的意思|示意
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建筑结构的安全等级
safety classes of building structures的网络常见释义
建筑结构安全等级 建筑抗震概念设计 conceptual earthquake-resis-tant design 建筑结构安全等级 safety classes of building structures 建筑结构抗震设防类别 classification for earth-quake-resistance of buildings ..