长江上游沱沱河源区多年冻土发育特征
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Characteristics of permafrost in Tuotuo River source area of upper Yangtze River
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图2. 研究区内钻孔的冻土类型(横坐标为投影距离,纵坐标为GPS所测的海拔) |
Fig. 2. Frozen soil types of boreholes in the study area. (The horizontal ordinate is the projection distance, and the ordinate is the altitude measured by GPS) |
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