1. Pre-itọju ti Rii-oke omi Adayeba omi igba ni pẹtẹpẹtẹ, amo, humus ati awọn miiran ti daduro ọrọ ati colloidal impurities ati kokoro arun, elu, ewe, virus ati awọn miiran microorganisms, won ni kan awọn iduroṣinṣin ninu omi, ni akọkọ. fa ti omi turbidity, awọ ati wònyí.Awọn...
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