Home / Standards / GB/T 12356-1990 GB/T 12356-1990 Abolished Micrographics--Test object character and instruction for 16mm microfilm recorder 缩微摄影技术 16mm平台式缩微摄影机用测试标板的特征及其使用 Standard Type GBT ICS 37.080 CCS A14 Status 废止 Issue Date 1990-05-11 Implementation 1991-03-01 Responsible Dept 国家标准委 Drafting Unit N/A