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2013-05-23 12:21
求翻译：Permeability increased from 25 md at the channel margin to 270 md in the center some 175 m away (Weber et al., 1972). Pumping tests showed that the drawdown was nearly concentric to the borehole, which suggests that the permeability had little preferred direction within the horizontal plane (Fig. 6.25).是什么意思？ 待解决
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Permeability increased from 25 md at the channel margin to 270 md in the center some 175 m away (Weber et al., 1972). Pumping tests showed that the drawdown was nearly concentric to the borehole, which suggests that the permeability had little preferred direction within the horizontal plane (Fig. 6.25).
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