发布时间:2025-02-01 06:44:25
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.
我家住6楼由于装修工人未关紧水阀漏水到楼下楼下私自改动烟道水就从改烟道的地方漏进他家责任怪谁
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