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| topographic factor; topographical factor | |||
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地形系数 : 21 phrases in 8 subjects |
| Aviation | 2 |
| Bridge construction | 4 |
| Earth sciences | 3 |
| Electronics | 1 |
| Environment | 1 |
| Geology | 1 |
| Space | 3 |
| Technology | 6 |
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