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tvrda voda

Natural waters contain impurities in various proportions; traditionally hardness is a measure of calcium or dissolved solids in a solution. Below is a list of the types of hardness and their referenced parts per million range.

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Actividade/ Sector: Desportos Category: Football

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The championship game of the NFL (National Football League,) played between the champions of the AFC and NFC at a neutral site late January or early ...