 |
| ventilation: 113 phrases in 23 subjects |
| Agriculture | 9 |
| Chemistry | 2 |
| Construction | 2 |
| Earth sciences | 5 |
| Economy | 1 |
| Electric motors | 3 |
| Electronics | 6 |
| Energy industry | 4 |
| Environment | 1 |
| Finances | 2 |
| Health care | 4 |
| Industry | 1 |
| Law | 1 |
| Materials science | 1 |
| Mechanic engineering | 12 |
| Medical | 7 |
| Microsoft | 4 |
| Municipal planning | 13 |
| Natural sciences | 4 |
| Patents | 3 |
| Social science | 2 |
| Technology | 1 |
| Transport | 25 |