Home / Standards / GBT 16900.2-2020 GBT 16900.2-2020 Rules for the presentation of graphical symbols — Part 2: Methods for testing comprehensibility 图形符号表示规则 第2部分:理解度测试方法 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A