 |
| double gear: 87 phrases in 16 subjects |
| Armored vehicles | 3 |
| Automated equipment | 8 |
| Automobiles | 10 |
| Cement | 1 |
| Construction | 2 |
| Gear train | 5 |
| General | 2 |
| Makarov | 1 |
| Mechanic engineering | 19 |
| Military | 1 |
| Nautical | 5 |
| Rail transport | 1 |
| Seismology | 1 |
| Shipbuilding | 3 |
| Technology | 16 |
| Transport | 9 |