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United States indoor swimming pool chlorine content of criteria for how much? (Ppm)

Jian Ling Yun Shan2010-01-27 18:01:50 +0000 #1
Please specify source, thank you.
donkey182010-01-27 18:15:12 +0000 #2
See Photos

below is based on the U.S. Chemical Industry Association of chlorine Chlorine Chemisty Council submitted the report to prevent potential microbial

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