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BOD of drinking water is:
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BOD" और COD क्या है? इनके काम क्या हैं? Difference Between BOD & COD । PvrAqua
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BOD level in fresh water should not exceed beyond:
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COD ( Chemical Oxygen Demand)
Difference between BOD and COD| BOD vs COD| Dissolved Oxygen| Water Treatment| Hindi/ Urdu
