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活 塞型 : 30 phrases in 9 subjects |
| Automobiles | 9 |
| Aviation | 1 |
| Earth sciences | 1 |
| General | 1 |
| Nautical | 1 |
| Plastics | 9 |
| Rail transport | 1 |
| Skydiving | 1 |
| Technology | 6 |
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