Home / Standards / GB/T 6390-1986 GB/T 6390-1986 Active Colour standard for use in the geological map 地质图用色标准 比例尺1∶500000~1∶1000000 Standard Type GBT ICS 17.180.20 CCS A79 Status 现行 Issue Date 1986-05-14 Implementation 1987-01-01 Responsible Dept 自然资源部(国土) Drafting Unit N/A