displacement : 194 phrases in 13 subjects |
Aviation | 18 |
Chemistry | 26 |
Computers | 1 |
Economics | 2 |
Geology | 2 |
Law | 8 |
Mechanic engineering | 4 |
Oil / petroleum | 111 |
Optics branch of physics | 1 |
Photography | 8 |
Road traffic | 2 |
Soil mechanics | 1 |
Technology | 10 |