| |||
gas-tight ring | |||
compression ring | |||
pressure ring | |||
piston ring | |||
| |||
pressure ring | |||
| |||
compression ring |
压缩 环 : 71 phrases in 13 subjects |
Automobiles | 19 |
Aviation | 3 |
Chemistry | 4 |
Compressors | 3 |
Electronics | 1 |
Mechanic engineering | 1 |
Metallurgy | 2 |
Oil / petroleum | 2 |
Plastics | 1 |
Refrigeration | 9 |
Shipbuilding | 1 |
Space | 1 |
Technology | 24 |