Home / Standards / GB/T 16900.4-2020 GB/T 16900.4-2020 Active Rules for the presentation of graphical symbols—Part 4: Methods for testing symbol referent association 图形符号表示规则 第4部分：对象相关性测试方法 Standard Type GBT ICS 01.080.01 CCS A22 Status 现行 Issue Date 2020-03-31 Implementation 2020-10-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委