标准号:ISO 9177-3-1994
中文标准名称:活动铅笔 第3部分:黑铅芯 HB铅笔芯弯曲强度
英文标准名称:Mechanical pencils - Part 3: Black leads - Bending strengths of HB leads
标准类型:Y50
发布日期:1999/12/31 12:00:00
实施日期:1999/12/31 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:Specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.