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limpiar : 72 phrases in 18 subjects |
| Agriculture | 6 |
| Chemistry | 4 |
| Coal | 1 |
| Communications | 2 |
| Cultural studies | 4 |
| Earth sciences | 1 |
| Environment | 5 |
| Forestry | 1 |
| General | 11 |
| Industry | 3 |
| Materials science | 2 |
| Mechanic engineering | 2 |
| Metallurgy | 7 |
| Municipal planning | 5 |
| Patents | 13 |
| Technology | 1 |
| Textile industry | 3 |
| United Nations | 1 |
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