发布时间:2025-01-19 20:34:12
一般浇完砼在三天后张能砌砖,如工程急第二天就能干,因为混凝土四小时就开始初凝,但要注意不要有大的振动。
为什么要单独规定二三级耐火等级建筑门厅走道部位吊顶的材料要求
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