BS 4555(1970) : 1970已作废
SPECIFICATION FOR HIGH EFFICIENCY DUST RESPIRATORS
出版：British Standards Institution
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基本信息
标准编号： BS 4555(1970) : 1970
发布时间：1970/1/1 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：12
标准简介
Gives requirements for respirators for use in areas where highly toxic particulate materials are handled. Written in terms of metric units, it gives inch equivalents which are equally valid. Covers construction, design, facepiece, filter, harness, speech transmission, connecting fittings, performance requirements and marking.
