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Brno, Czech Republic. 16th Nov, 2018. The platinum and iridium alloy cylinder (pictured on November 16, 2018 at the Czech Metrology Institute in Brno, Czech Republic) will no longer be a kilogram
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eXpedicion FM on Twitter: "#TalDiaComoHoy 1889 Se define 1 #metro = distancia entre 2 líneas en una barra hecha con una aleación de platino con 10% de iridio #Paris https://t.co/cydrxn2m4z" / Twitter
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