关闭 阀 : 65 phrases in 19 subjects |
Agriculture | 2 |
Architecture | 1 |
Automobiles | 3 |
Aviation | 3 |
Drilling | 3 |
Electric machinery | 1 |
Electronics | 2 |
General | 2 |
Hydroelectric power stations | 1 |
Metallurgy | 5 |
Mining | 4 |
Oil / petroleum | 10 |
Oil processing plants | 1 |
Plastics | 4 |
Refrigeration | 1 |
Shipbuilding | 2 |
Space | 1 |
Technology | 18 |
Wind Energy | 1 |