 |
| surfaces: 223 phrases in 27 subjects |
| Agriculture | 15 |
| Chemistry | 3 |
| Communications | 4 |
| Construction | 10 |
| Earth sciences | 25 |
| Electronics | 12 |
| Energy industry | 6 |
| Environment | 12 |
| General | 7 |
| Health care | 2 |
| Hobbies and pastimes | 1 |
| Industry | 6 |
| Information technology | 2 |
| Labor law | 2 |
| Life sciences | 10 |
| Marketing | 1 |
| Materials science | 2 |
| Mechanic engineering | 22 |
| Medical | 11 |
| Metallurgy | 19 |
| Microsoft | 4 |
| Mining | 1 |
| Natural sciences | 1 |
| Patents | 2 |
| Statistics | 4 |
| Technology | 1 |
| Transport | 38 |