Kev ceev faj rau kev khaws cia Cia hauv qhov chaw txias, qhuav, thiab qhov cua zoo.
Khaws kom deb ntawm qhov hluav taws kub thiab cua sov. Khaws lub thawv kaw kom nruj.
Nws yuav tsum tau muab cais tawm ntawm cov oxidants, txo cov neeg ua haujlwm, acids, alkalis, thiab cov tshuaj noj tau, thiab tsis txhob sib xyaw cia.
Nruab nrog qhov tsim nyog ntau yam thiab ntau ntawm cov khoom siv hluav taws xob.
Qhov chaw cia khoom yuav tsum tau nruab nrog cov khoom siv kho mob thaum muaj xwm txheej ceev thiab cov ntaub ntawv tsim nyog.
