门开关 : 97 phrases in 16 subjects |
Agriculture | 1 |
Architecture | 1 |
Automobiles | 34 |
Aviation | 5 |
Construction | 3 |
Dermatology | 1 |
Electronics | 2 |
General | 3 |
Geophysics | 2 |
Hydraulics | 1 |
Hydroelectric power stations | 1 |
Plastics | 1 |
Security systems | 1 |
Shipbuilding | 3 |
Technology | 36 |
Telecommunications | 2 |