Shaft to ventilation and excavation, repair qanat soil when used.

竖井是为了通风和挖掘 、 修理坎儿井时提土之用的.

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Qanat leads to an underground river, so the desert into an oasis.

坎儿井引出了地下河水, 使沙漠变成绿洲.

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These are the qanat mouth of the shaft.

这些就是坎儿井的竖井口.

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