 |
| ventilation: 218 phrases in 25 subjects |
| Agriculture | 35 |
| Chemistry | 10 |
| Coal | 1 |
| Communications | 1 |
| Construction | 7 |
| Earth sciences | 7 |
| Economy | 8 |
| Electronics | 4 |
| Energy industry | 3 |
| Environment | 1 |
| Finances | 10 |
| General | 8 |
| Health care | 5 |
| Industry | 4 |
| Labor law | 2 |
| Law | 1 |
| Life sciences | 2 |
| Materials science | 1 |
| Mechanic engineering | 30 |
| Medical | 8 |
| Microsoft | 3 |
| Municipal planning | 23 |
| Natural sciences | 3 |
| Technology | 2 |
| Transport | 39 |