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ground layer; surface layer | |||
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surface layer |
近 地层 : 24 phrases in 12 subjects |
Aviation | 2 |
Bridge construction | 1 |
Drilling | 1 |
Earth sciences | 2 |
Geology | 1 |
Geophysics | 4 |
Latin | 1 |
Mining | 1 |
Oil / petroleum | 4 |
Soil science | 2 |
Space | 2 |
Wind Energy | 3 |