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转 /小时 : 27 phrases in 11 subjects |
| Agriculture | 1 |
| Automobiles | 6 |
| Aviation | 3 |
| Business | 1 |
| Drilling | 2 |
| Earth sciences | 1 |
| General | 2 |
| Mechanics | 3 |
| Nautical | 1 |
| Scientific | 2 |
| Technology | 5 |
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