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| reciprocating engine: 33 phrases in 14 subjects |
| Armored vehicles | 1 |
| Aviation | 7 |
| Construction | 1 |
| Energy industry | 9 |
| Energy system | 1 |
| General | 1 |
| Machinery and mechanisms | 1 |
| Mechanic engineering | 1 |
| Military | 1 |
| Nautical | 3 |
| Refrigeration | 1 |
| Shipbuilding | 1 |
| Technology | 4 |
| Transport | 1 |