Cov lus qhia rau kev tu thiab tu
Cov rooj zaum WC no yog tsim los ntawm cov ntaub ntawv zoo ib puag ncig.
Qhov chaw du, tsis ntxeem tau yog qhov zoo tagnrho rau kev tswj xyuas kev nyiam huv. Tsis txhob siv cov khoom siv tshuaj ntxuav tes los yog cov khoom uas muaj cov tshuaj chlorine los yog cov kua qaub, vim tias cov khoom no yuav ua rau yellowing lossis tev ntawm cov khoom. Cov xab npum nruab nrab lossis me me, cov khoom siv tu tsev hauv tsev yog qhov zoo tshaj plaws rau kev tu kom zoo, tsis muaj teeb meem.
Tom qab ntxuav, so lub rooj zaum nrog ib daim ntaub zoo wrung-tawm. Tawm ntawm lub rooj zaum thiab lub hau thaum twg cov khoom siv tu muaj zog tau tso rau hauv lub tais ntawm WC lauj kaub kom tsis txhob muaj vapors.