 |
grooved piston
| ring
| grooved piston | |
| compr. | 带槽活塞 |
| ring | |
| gen. | 戒指 |
| auto.ctrl. | 环状单元 |
| hydroel.st. | 环 |
| interntl.trade. | 交易场; 垄断集团 |
| |||
| 带槽活塞 | |||
|
grooved piston ring : 7 phrases in 3 subjects |
| Automobiles | 2 |
| Compressors | 2 |
| Technology | 3 |
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