frozen earth engineering
frozen earth exploration
frozen earth temperature field
frozen storage
冷冻冷藏
冷冻贮藏
冷冻保存
冷冻储藏
冷冻存贮
冻藏时间
冻藏过程
冷冻
冻藏
冻存
frozen storage condition
Frozen storage stability
frozen storage temperature
key bed of frozen earth
Maximum frozen earth depth
stability of frozen storage
water and salt of frozen earth
rare earth storage hydrogen alloy