percée: 42 phrases in 17 subjects |
Agriculture | 2 |
Chemistry | 2 |
Coal | 1 |
Communications | 4 |
Earth sciences | 1 |
Environment | 2 |
Fish farming pisciculture | 1 |
General | 1 |
Health care | 3 |
Industry | 7 |
Materials science | 1 |
Mechanic engineering | 9 |
Metallurgy | 1 |
Municipal planning | 1 |
Natural resourses and wildlife conservation | 3 |
Scientific | 1 |
Transport | 2 |