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@tommalecek7 @SchellePavel @PiratskaStrana USGS uvádí "the market for rubidium is extremely small, amounting to 1 to 2 metric tons per year (t/yr) in the United States. " https://t.co/9l2uyuvL1K Tak fakt nevím.
@tommalecek7 @SchellePavel @PiratskaStrana USGS uvádí "the market for rubidium is extremely small, amounting to 1 to 2 metric tons per year (t/yr) in the United States. " https://t.co/9l2uyuvL1K Tak fakt nevím.