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| Position: Chinese Standard in English/SL 21-1990 |
| SL 21-1990 (English Version) | |||
| Standard No.: | SL 21-1990 | Status: | superseded |
| Language: | English | File Format: | |
| Word Count: | Price(USD): | remind me the price change | |
| Implemented on: | Delivery: | ||
| Standard No.: | SL 21-1990 |
| Professional Classification: | SL Professional Standard - Water Resources |
| Status: | superseded |
| Superseded by: | SL 21-2006 Standard for observations of precipitation |
| Superseded on: | 2006-10-1 |
| Language: | English |
| File Format: |