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| chemical constituent | |||
| chemical composition | |||
| chemical component | |||
| 化学组分: 16 phrases in 7 subjects |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 1 |
| Metallurgy | 2 |
| Technology | 8 |
| United Nations | 2 |
| Water resources | 1 |
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