BS 679:1989被替代
Specification for filters, cover lenses and backing lenses for use during welding and similar operations
出版：British Standards Institution
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基本信息
标准编号： BS 679:1989
发布时间：1989/6/30 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：16
标准简介
Requirements for transmittance, optical quality, refractive properties, permanence and robustness. Gives guidance on selection and use.
标准备注
© British Standards Institution 2013
本标准替代的旧标准
等同采用的国际标准
ISO 4850:1979 - Similar
