Agree. It seems impossible or too expensive to

來源: panlm_ 於 2017-02-19 07:07:58 [] [舊帖] [給我悄悄話] 閱讀數 : (303 bytes)

transport the water via a pipe line from 貝加爾湖(海拔450米，蒙古高原海拔1580米（烏蘭巴托海拔1350米）to 蘭州(海拔1520米).

請您先登陸，再發跟帖！