发布时间:2025-02-06 02:08:43
临边防护栏杆的上杆应符合的规定有以下几点:
1、栏杆高度不应该小于1.05m,高层建筑的栏杆高度应再适当提高,不宜超过1.2米。
2、栏杆离地面或屋面0.1高度内不应留空。
3、有儿童活动的场所,栏杆应采用不易攀登的构造。
液压电磁阀型号HD-2D2-G02-LW-E和HD-3C2-G02-LW-E的意义
2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43 2025-02-06 02:08:43cad制图中怎样把已有的素材放到自己做的当中及改变其适合比列
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