Agree. It seems impossible or too expensive to

来源: panlm_ 于 2017-02-19 07:07:58 [] [旧帖] [给我悄悄话] 阅读数 : (303 bytes)

transport the water via a pipe line from 贝加尔湖(海拔450米，蒙古高原海拔1580米（乌兰巴托海拔1350米）to 兰州(海拔1520米).

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