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Chinese dictionary
n.an irrigation system of wells connected by underground channel used in Xinjiang Uygur Autonomous Region
坎儿井供水
get water from a karez
18世纪以后,绿洲主要分布在依靠坎儿井灌溉的地方。
The oases were mainly distributed in the regions where the lands could be irrigated with karezes after the 18th century.