Home / Standards / GB/Z 20227-2006 GB/Z 20227-2006 Active Micrographics - Expungement, deletion, correction or amendment of records on microforms 缩微摄影技术 缩微记录的清除、删除、校正或修正 Standard Type GBZ ICS 37.060 CCS A14 Status 现行 Issue Date 2006-04-19 Implementation N/A Responsible Dept 国家标准委 Drafting Unit 国家标准委