Cart:
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| QB/T 1729-1993 |
ISO 100/21 Celsius black -and -white panchromatic negative roll film for still photography ISO 100/21°黑白照相胶卷 |
China Light Industry
Standards ISO 100 21 |
 English PDF |
| QB/T 1728-1993 |
(ISO 100/21 Degree monochrome photographic film) ISO 100/21°黑白照相胶片 |
China Light Industry
Standards ISO 100 21 |
English PDF |
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