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Dias | |||
Permian (Period) | |||
Dias (Dyas) | |||
Permian period; Dyas | |||
Permian | |||
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Dyas | |||
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Permian | |||
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Permian | |||
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Permian period (system) |
二 叠纪 : 29 phrases in 9 subjects |
Drilling | 4 |
Earth sciences | 7 |
Engineering geology | 2 |
Geology | 2 |
Geophysics | 2 |
Hydroelectric power stations | 2 |
Mining | 1 |
Oil / petroleum | 2 |
Technology | 7 |