BS 939-1977 标准详情
- 标准号:BS 939-1977
- 中文标题:工程角尺(包括圆柱直角规和矩形角尺)规范
- 英文标题:Specification for engineers' squares (including cylindrical and block squares)
- 标准类别:英国标准
- 发布日期:1977-09-30
Squares of try-square type in three grades of accuracy: AA, A, B ; cylindrical squares in grade AA; solid form block squares in grades AA, A; open form block squares in grades A, B. Nomenclature, designation, sizes, material, manufacture, design, acc
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