 |
| exhaust system: 42 phrases in 13 subjects |
| Astronautics | 1 |
| Chemistry | 3 |
| Environment | 3 |
| General | 2 |
| Industry | 2 |
| Labor law | 1 |
| Law | 1 |
| Mechanic engineering | 4 |
| Medical | 2 |
| Municipal planning | 2 |
| Natural resourses and wildlife conservation | 4 |
| Transport | 16 |
| United Nations | 1 |