BS 5478-1(1977) : 1977被替代
CALCULATORS AND ADDING MACHINES - NUMERIC SECTION OF TEN KEY KEYBOARDS FOR CALCULATORS AND ADDING MACHINES
出版：British Standards Institution
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基本信息
标准编号： BS 5478-1(1977) : 1977
发布时间：1977/1/1 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：3
标准简介
Sets out the composition and layout of ten-key keyboards for adding and calculating machines, including shape of keys, the slope of the keyboard plane, the maximum key stroke and the key spacing. Applies only to numerical keys which constitute ten-key keyboards, and excludes function keys on such keyboards.
替代本标准的新标准
