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A comment on Australian ‘Infinity Train’ uses gravity to recharge batteries. Parent comment

Re:Australian ‘Infinity Train’ uses gravity to recharge batt... by xzcvczx on Friday March 04, 2022 @04:54PM (#30561119)
i assume you mean "wasn't done before" in regards to modern railroads..... https://www.rankers.co.nz/system/experience_images/11476/lar...
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