多年冻土区 meaning in Chinese

permafrost region

Plateau many year frozen earth area roadbed construction technology
高原多年冻土区路基的施工技术
Many year frozen earth area heave harm and the preventing and controlling measure
多年冻土区冻胀的危害与防治措施
Numerical analyses of pavement deformation and stress in permafrost regions
多年冻土区路基路面变形及应力的数值分析
Application of thermal insulation material in plateau permafrost soil zone subgrade
高原多年冻土区路基保温材料的应用
Numerical simulation for temperature field of roadlbed on permafrost with insulation
多年冻土区含保温夹层路基温度场的数值模拟

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