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retardador : 52 phrases in 16 subjects |
| Agriculture | 3 |
| Chemistry | 9 |
| Coal | 1 |
| Commerce | 1 |
| Construction | 2 |
| Earth sciences | 5 |
| Electronics | 3 |
| Environment | 1 |
| General | 3 |
| Industry | 5 |
| Isolation | 2 |
| Materials science | 1 |
| Mechanic engineering | 2 |
| Metallurgy | 1 |
| Natural sciences | 2 |
| Transport | 11 |
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