|
back pressure : 43 phrases in 13 subjects |
| Automated equipment | 2 |
| Coal | 3 |
| Construction | 4 |
| Earth sciences | 2 |
| Electricity generation | 1 |
| Electronics | 1 |
| General | 1 |
| Materials science | 1 |
| Mechanic engineering | 9 |
| Metallurgy | 5 |
| Municipal planning | 2 |
| Technology | 7 |
| Transport | 5 |