WSO Water Treatment Grade 1: Water Disinfection, Ch. 12

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AmericanWaterWorks

AmericanWaterWorks

Күн бұрын

Пікірлер: 3
@elsayedmahmoud2191
@elsayedmahmoud2191 2 жыл бұрын
Why is it importemt to exist some residual chlorine??
@iccepicc5260
@iccepicc5260 4 жыл бұрын
thank!
@sankako6075
@sankako6075 3 жыл бұрын
chlorine, highly poisoinous
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