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座环 : 68 phrases in 17 subjects |
Automobiles | 8 |
Aviation | 1 |
Chemistry | 1 |
Compressors | 2 |
Construction | 1 |
Dermatology | 1 |
Electric machinery | 1 |
Electronics | 4 |
Engineering geology | 1 |
Hydroelectric power stations | 9 |
Nautical | 1 |
Oil / petroleum | 3 |
Rail transport | 3 |
Shipbuilding | 1 |
Space | 1 |
Technology | 26 |
Textile industry | 4 |