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| Position: Chinese Standard in English/GB 639-1977 |
| GB 639-1977 (English Version) | |||
| Standard No.: | GB 639-1977 | Status: | superseded |
| Language: | English | File Format: | |
| Word Count: | Price(USD): | remind me the price change | |
| Implemented on: | Delivery: | ||
| Standard No.: | GB 639-1977 |
| Status: | superseded |
| Superseded by: | GB/T 639-1986 Chemical reagents--Sodium carbonate, anhydrous |
| Superseded on: | 1987-7-1 |
| Language: | English |
| File Format: |