UL Standard for Safety Visual Signaling Appliances - Private Mode Emergency and General Utility Signaling Fourth Edition; Reprint with Revisions Through and Including 11/7/2003
国外标准现行
标准号:UL 1638-2001
标准名称: 可视信号装置.专用型应急信号和通用信号
英文名称:UL Standard for Safety Visual Signaling Appliances - Private Mode Emergency and General Utility Signaling Fourth Edition; Reprint with Revisions Through and Including 11/7/2003