purga : 94 phrases in 14 subjects |
Agriculture | 8 |
Chemistry | 8 |
Coal | 1 |
Construction | 3 |
Earth sciences | 8 |
Energy industry | 4 |
Environment | 1 |
General | 4 |
Industry | 5 |
Materials science | 3 |
Mechanic engineering | 33 |
Metallurgy | 7 |
Technology | 1 |
Transport | 8 |