powered via cable? or is that just the water?https://twitter.com/mashable/status/1289019700978933761 …
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I think you were right the first time - drone is more flexible. One drone design works for buildings (even those without smooth vertical exteriors), wind turbine blades, etc. A rover, even rappelling, would be hard to design to handle all those cases.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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