发布时间:2025-01-17 23:11:26
安徽步升楼梯厂家,告诉,一般正常情况下是可以的,得用切割机把楼板面切深些,若直接用FENG高打的,会影响楼板的承受力哦,所以得先切,再打,就可以了,你若再不放心,就麻烦些再用混凝土再做一梁的哦,一般正常的都不需要这样做的哦,因为我们见多了这样的
蝉是一种夏季出没的昆虫又叫知了根据你所知道的有关蝉的身体结构特点和生活习性提出一个相关问题并
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