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下水车 : 25 phrases in 10 subjects |
| Agriculture | 1 |
| Automobiles | 3 |
| Aviation | 1 |
| Drilling | 1 |
| Earth sciences | 2 |
| General | 1 |
| Mechanic engineering | 1 |
| Oil / petroleum | 2 |
| Rail transport | 3 |
| Technology | 10 |
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