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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/Z 20648-2006 |
Electronic imaging - Recommendations for the Expungement of information recorded on write-once optical media 电子成像 擦除记录在一次写入光学介质上的信息的推荐方法 |
China National Standards Expungement, |
 English PDF |
| GB/Z 20227-2006 |
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 |
China National Standards Expungement, |
English PDF |
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