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| mantle friction; skin friction; surface friction | |||
| 表面摩阻: 16 phrases in 9 subjects |
| Aviation | 1 |
| Bridge construction | 3 |
| Drilling | 1 |
| Oil / petroleum | 2 |
| Soil science | 1 |
| Space | 1 |
| Sports | 1 |
| Technology | 5 |
| Wind Energy | 1 |
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