Home / Standards / GB/T 6161-1994 GB/T 6161-1994 Abolished Micrographics--Test chart No.2--Description and use in microfilming 缩微摄影技术 2号测试图的特征及其在缩微摄影技术中的应用 Standard Type GBT ICS 37.080 CCS A14 Status 废止 Issue Date 1994-04-01 Implementation 1994-12-01 Responsible Dept 国家标准委 Drafting Unit N/A