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户到户的 : 22 phrases in 14 subjects |
| Advertising | 2 |
| Business | 1 |
| Commerce | 1 |
| Drilling | 1 |
| Economy | 2 |
| Electronics | 1 |
| General | 3 |
| Information technology | 1 |
| Logistics | 1 |
| Oil and gas technology | 1 |
| Project management | 5 |
| Rail transport | 1 |
| Securities | 1 |
| Technology | 1 |
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