活塞环 : 444 phrases in 17 subjects |
Agriculture | 1 |
Architecture | 2 |
Automobiles | 229 |
Aviation | 1 |
Chemistry | 1 |
Compressors | 25 |
Construction | 1 |
Drilling | 3 |
Electronics | 1 |
General | 2 |
Metallurgy | 4 |
Nautical | 3 |
Oil / petroleum | 3 |
Plastics | 4 |
Refrigeration | 1 |
Shipbuilding | 23 |
Technology | 140 |