发布时间:2025-02-02 00:59:19
一般现浇的楼板浇好以后,过一个礼拜以上才能够敲楼梯的,因为这时候水泥凝固了,这样敲楼梯不会发生危险的。
用425水泥做成水泥制品达到c60标准 想问下c60标准水泥配比
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