1. Mvura Mvura inoparadzaniswa kuva mvura yakapfava uye yakaoma mvura.Mvura yakaoma ine calcareous salts, iyo inowanzogara pahembe pamwe chete nemadetergents ekugadzira mvura-insoluble sediments uye mavara panguva yekugeza.Izvi hazvingorase detergent chete, asiwo zvinokonzera dambudziko...
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