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| backfill; dump pit; landfill | |||
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填坑 : 19 phrases in 8 subjects |
| Agriculture | 1 |
| Bridge construction | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Engineering geology | 2 |
| Metallurgy | 1 |
| Technology | 11 |
| Waste management | 1 |
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