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May 30, 2020
TDS valve low, safety for health but no nutrition: TDS high, more nutrition contents but not safety for health.The safety standard of U.S.A water quality of TDS value is 0ppm 50ppm, for European standard is 0 70ppm, China national standard is not more than 500ppm. The generation description of TDS is the total dissolved solids of water, higher value means the chow
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