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7. 典型钻孔地下冰发育状况(重复分凝冰:TTH-01、TTH-09和TTH-20;脉冰:TTH-03和TTH-08;侵入冰:TTH-30;分凝冰:TTH-06、TTH-07和TTH-25) |
Fig. 7. Development of ground ice in typical boreholes (repeatedly segregated ice: TTH-01, TTH-09, and TTH-20; vein ice: TTH-03 and TTH-06; intrusive ice: TTH-30; segregated ice: TTH-04, TTH-07, and TTH-25) |
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