BS 1669:1972被替代
Specification for industrial perforated plates
出版：British Standards Institution
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基本信息
标准编号： BS 1669:1972
发布时间：1972/2/11 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：0
标准简介
Plates with round or square perforations, staggered pitch. Round holes 125 to 3 .15 mm diameter, square holes 125 mm to 4 mm side of square, following the R 20 preferred number series. Five classes of round hole plate open areas 58 per cent to 23 per cent; four of square hole plates open areas 64 per cent to 31 per cent.
标准备注
© British Standards Institution 2013
Replaces notes:
Replaces BS 1669:1950.
替代本标准的新标准
