BS 5621(1992) : 1992被替代
SPECIFICATION FOR DIMENSIONS OF ROTARY MASONRY AND ROTARY MASONRY IMPACT DRILLS WITH HARDMETAL TIPS
出版：British Standards Institution
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基本信息
标准编号： BS 5621(1992) : 1992
发布时间：1992/1/1 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：8
标准简介
Describes the dimensions, of rotary and rotary impact masonry drill bits with hardmetal tips, having diameters of 4 mm to 25 mm and overall and working lengths in the series short, long and extra long. Does not apply to hammer drills.
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