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| area research; regional survey | |||
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区域调查 : 36 phrases in 9 subjects |
| Advertising | 1 |
| Agriculture | 1 |
| Bridge construction | 1 |
| Cartography | 1 |
| Commerce | 2 |
| Earth sciences | 1 |
| Engineering geology | 1 |
| Rail transport | 1 |
| Technology | 27 |
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