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              中國管道發展趨勢探析

              你能想象,有一天人們可以通過管道環球旅行嗎?近期,美國兩個公司相繼發布消息稱將研發真空管道列車。據預測,搭乘這種列車,從紐約到北京只需2個小時,即便是環球旅行也只需6個小時。盡管這個想法大膽得令人咋
               
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