Watchers

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  Melody Hateley

  https://inventmag.com/%eb%a9%94%ec%9d%b4%ec%a0%80%ec%82%ac%ec%9d%b4%ed%8a%b8-%ec%95%88%ec%a0%84%ed%95%9c-%eb%8f%84%eb%b0%95-%ed%99%98%ea%b2%bd%ec%9d%84-%ec%a0%9c%ea%b3%b5%ed%95%98%eb%8a%94-%eb%b0%a9%eb%b2%95/