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| 永冻土〔层〕 | |||
| 永冻土壤多年冻土，pergelisolum | |||
| 永久冻土带 | |||
| 永冻; 常冻; 永冻层; 水冻地区; 永久冻土; 永冻土壤; 多年冻土 | |||
| 永冻土 | |||
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pergelisol : 2 phrases in 2 subjects |
| Engineering geology | 1 |
| Technology | 1 |
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