GB/T 16901.2-2013
技术文件用图形符号表示规则 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其交换要求
Rules for design of graphical symbols for use in the technical documentation.Part 2: Specification for graphical symbols in a computer sensible form, including graphical symbols for a reference library, and requirements for their interchange
GBT16901.2-2013, GB16901.2-2013