BS 7443:1991被替代
Specification for sound systems for emergency purposes
出版：British Standards Institution
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基本信息
标准编号： BS 7443:1991
发布时间：1991/6/28 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：18
标准简介
Characteristics and methods of test for emergency broadcast sound systems for indoor or outdoor. Includes environmental conditions, marking symbols, installation and safety requirements, and an automatic system for checking correct functioning.
标准备注
© British Standards Institution 2013
Amendment notes:
AMD 7675 published 15 June 1993
替代本标准的新标准
等同采用的国际标准
IEC 60849 Ed. 2.0 - Similar
