Da farko, ya dogara da yanayin amfani da halaye, a cikin wane yanayi za ku yi amfani da shi na dogon lokaci, a ofis, a gida, tuki, tafiya, gudu, mota ko hawan dutse. Tabbatar da yanayin amfani kuma zaɓi kofin ruwa wanda ya dace da yanayin. Wasu mahalli suna buƙatar...
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