Mechanical pencils for technical drawings — Part 1: Classification, dimensions, performance requirements and testing
机械铅笔技术图纸 - 第1部分:分类 尺寸 性能要求和测试
发布日期:
2016-09-23
ISO 9177-1:2016规定了用于技术图纸的手持式机械铅笔的分类、尺寸、性能要求和测试。
ISO 9177-1:2016 specifies classification, dimensions, performance requirements and testing for hand-held mechanical pencils used for technical drawings.