BS 4558:1970被替代
Specification for positive pressure, powered dust respirators
出版：British Standards Institution
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基本信息
标准编号： BS 4558:1970
发布时间：1970/3/17 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：0
标准简介
Specifies requirements for respirators comprising a mask supplied with filtered air from a power pack, to provide protection whilst reducing the respiratory load.
标准备注
© British Standards Institution 2013
