UL 793 Ed. 2 标准详情
- 标准号:UL 793 Ed. 2
- 中文标题:自动操作屋顶通风口烟雾和热量
- 英文标题:Automatically Operated Roof Vents For Smoke And Heat
- 标准类别:美国保险商实验室UL
- 发布日期:
Covers automatically operated roof vents for smoke and heat that fall into two general categories- mechanically-opened vents and gravity-opened. Mechanically-opened vents consist primarily of a body frame, one or more damper covers and hatches, and o
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