ground level : 84 phrases in 15 subjects |
Agriculture | 6 |
Aviation | 3 |
Construction | 10 |
Earth sciences | 1 |
Environment | 27 |
Forestry | 1 |
General | 3 |
Life sciences | 3 |
Mechanic engineering | 2 |
Metallurgy | 3 |
Natural resourses and wildlife conservation | 3 |
Nuclear physics | 10 |
Obsolete / dated | 1 |
Soil science | 1 |
Transport | 10 |