BS 679:1959被替代
Specification for filters for use during welding and similar industrial operations
出版：British Standards Institution
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基本信息
标准编号： BS 679:1959
发布时间：1959/12/10 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：20
标准简介
Classifies filters into shades according to visual density, recommends shades for various industrial uses. Visual density, protection against ultra-violet radiation, total-heat protection, antiglare protection, refractive properties, freedom from optical imperfections, uniformity of density, permanence, quality of cover glasses, colour grading , and (for plastics filters) flammability tests.
标准备注
© British Standards Institution 2013
Replaces notes:
Replaces BS 679:1947.
Amendment notes:
AMD 2209
AMD 316
PD 3995
PD 4281
PD 5076
替代本标准的新标准
