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back-pressure : 46 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 | 10 |
Transport | 5 |