 |
|
four- engine : 53 phrases in 16 subjects |
| Armored vehicles | 1 |
| Astronautics | 2 |
| Automobiles | 4 |
| Aviation | 3 |
| British usage, not spelling | 1 |
| Environment | 1 |
| General | 1 |
| Mechanic engineering | 2 |
| Military | 10 |
| Oil / petroleum | 2 |
| Politics | 1 |
| Production | 1 |
| Shipbuilding | 1 |
| Space | 8 |
| Technology | 12 |
| Transport | 3 |