 |
| ring packing: 91 phrases in 30 subjects |
| Armored vehicles | 4 |
| Artillery | 1 |
| Automated equipment | 3 |
| Automobiles | 3 |
| Aviation | 1 |
| Chemistry | 1 |
| Construction | 4 |
| Drilling | 4 |
| Electronics | 1 |
| Energy industry | 1 |
| Forestry | 1 |
| General | 2 |
| Machine components | 2 |
| Mechanic engineering | 3 |
| Military | 2 |
| Mining | 2 |
| Nautical | 8 |
| Oil / petroleum | 4 |
| Oil and gas | 4 |
| Oil and gas technology | 2 |
| Oilfields | 3 |
| Polygraphy | 1 |
| Production | 1 |
| Rail transport | 4 |
| Shipbuilding | 4 |
| Technology | 13 |
| Thermal engineering | 3 |
| Transport | 7 |
| Vibration monitoring | 1 |
| Weapons and gunsmithing | 1 |