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| 排气旋塞 | |||
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cock air : 49 phrases in 12 subjects |
| Automobiles | 2 |
| Chemistry | 4 |
| Compressors | 2 |
| Construction | 3 |
| Drilling | 3 |
| Metallurgy | 3 |
| Oil / petroleum | 2 |
| Rail transport | 2 |
| Refrigeration | 1 |
| Shipbuilding | 4 |
| Space | 1 |
| Technology | 22 |
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