发布时间:2025-01-17 04:49:34
楼梯、扶手和踏步等应符合下列规定:
1 楼梯间应有直接的天然采光和自然通风;
2 楼梯除设成人扶手外,应在梯段两侧设幼儿扶手,其高度宜为0.60m;
3 供幼儿使用的楼梯踏步高度宜为0.13m,宽度宜为0.26m;
4 严寒地区不应设置室外楼梯;
5 幼儿使用的楼梯不应采用扇形、螺旋形踏步;
6 楼梯踏步面应采用防滑材料;
7 楼梯间在首层应直通室外。
水泵买错了,本来是要买自吸泵的,买成增压泵了,如果我把增压泵的叶轮换成自吸泵的叶轮。是不是就成自
2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34 2025-01-17 04:49:34我的房子是一楼没有单独走下水我已经装修好了 如何预防下水管堵塞污水往屋内泛水的问题
2025-01-17 04:49:34一座桥长80m宽6m下面是用梯形的柱子顶起来的梯形下底18m深7m求这个梯形需要多少土石
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