标准号:BS 2457-1975
中文标准名称:制图室用分度规规范
英文标准名称:Specification for protractors for drawing office use
标准类型:Y50
发布日期:1975/1/31 12:00:00
实施日期:1975/1/31 12:00:00
中国标准分类号:Y50
国际标准分类号:01.100.40
适用范围:Includes preferred sizes, for circular and semi-circular protractors made from transparent plastics. Specifies qualities of suitable materials.