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青藏高原多年冻土区
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青藏高原多年冻土区
Encyclopedia
理学
中国的冻土
释
permafrost region of Qingzang Gaoyuan
青藏高原多年冻土区
世界中、低纬度地带海拔最高(平均4000米以上)、面积最大(150万平方千米)的冻土区。年均温度最低-5~-4℃,冻土厚度达一二百米;地温年变化深度由6~17米;细颗粒冻土层温度比粗颗粒土低,在高原上要差1~3℃。
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air sac
air sacculitis
air sacs
air sample collection
air sampling
air-scape
airscoop
air-screen cleaner
airscrew
air-sea exchange
air-sea exchange coefficient
air-sea fluxes
air-sea flux observation buoy
air-sea gas transfer velocity
air-sea heat flux
air-sea interaction
air-sea interface
airsecond
Air security assurance
air separation plant control system
air separation system
air-set
air shaft
air shaft arrangement form
air sharp shrinkage chute
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