liner: 59 phrases in 15 subjects |
Chemistry | 2 |
Coal | 3 |
Earth sciences | 11 |
Electric motors | 2 |
Electronics | 2 |
Environment | 3 |
Fish farming pisciculture | 3 |
General | 3 |
Industry | 2 |
Materials science | 3 |
Mechanic engineering | 9 |
Natural sciences | 1 |
Patents | 3 |
Technology | 4 |
Transport | 8 |