Highways in seasonal frozen region  季冻区公路

Hydrology in the permafrost and seasonal frozen regions  冻土水文

Seasonal frozen depth  季节冻结深度

Seasonal Frozen Ground  季节冻土; 季节性冻土

Seasonal Frozen Region  季节性冻土; 季节冻土区; 季冻区

Seasonal Frozen Regions  季节冻土

Seasonal frozen soil  季节性冻土; 季节冻土; 季冻土

seasonal frozen soil layer  季节冻土层; 季节性冻土层

Seasonal Frozen Soil Region  季节性冻土区

The seasonal frozen soil region  季节性冻土区

aged frozen earth  多年冻土

FROZEN EARTH  地震反应; 冻土

FROZEN EARTH AREA  冻土地区

frozen earth cutting  冻土路堑

frozen earth engineering  冻土工程

frozen earth exploration  冻土勘探

Frozen earth in the plateau  高原冻土

Frozen Earth Roadbed  冻土路基

frozen earth storage  冻土储存