indicateurs de direction : 65 phrases in 12 subjects |
Aviation | 3 |
Communications | 3 |
Electronics | 3 |
Forestry | 1 |
General | 5 |
Life sciences | 3 |
Lighting other than cinema | 1 |
Mechanic engineering | 2 |
Natural resourses and wildlife conservation | 2 |
Natural sciences | 1 |
Rail transport | 2 |
Transport | 39 |