发布时间:2025-01-19 20:17:41
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。
同福宾馆的大厅里有一根长8分米宽4分米高4米的长方体水泥柱为迎接五一劳动节要在柱子四周包上彩纸
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