A drone (or tractor) with high-powered lasers? Or a 10000 psi water stream? | Hacker News

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Tempest1981 on July 7, 2017 | parent | context | favorite | on: Roomba Inventor Joe Jones on His New Weed-Killing ...

A drone (or tractor) with high-powered lasers? Or a 10000 psi water stream?

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