UL 1711 Ed. 4 标准详情
- 标准号:UL 1711 Ed. 4
- 中文标题:放大器的消防保护信号系统
- 英文标题:Amplifiers For Fire Protective Signalling Systems
- 标准类别:美国保险商实验室UL
- 发布日期:
Covers electrically- and electronically-operated amplifiers that provide speech communication and distinctive sounds in conjunction with fire protective signaling systems for indoor location in accordance with the following standards- a) National Ele
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