发布时间:2025-02-01 06:45:35
C40的立方体抗压强度标准值(在标准养护条件下养护达到28D龄期,用标准方法测得的极限抗压强度)为40MPa.
圆形钢筋混凝土蓄水池图集04s803的配筋图中沿r1234是什么意思
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