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valve cylinder : 52 phrases in 10 subjects |
| Automobiles | 11 |
| Compressors | 2 |
| Electronics | 3 |
| General | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Shipbuilding | 5 |
| Steel production | 1 |
| Technology | 24 |
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