美利体育登录入口官网:IEC 81714-2:1998
产品技术文件用图形符号的设计 第2部分:图形符号(包括基准符号库中的图形符号)的计算机电子文件格式规范及交换要求
Design of graphical symbols for use in the technical documentation of products - Part 2: Specification for graphical symbols in a computer sensible form, including graphical symbols for a reference library, and requirements for their interchange