Thaum siv ntau lub tshuab nqus tsev ntxhua khaub ncaws hauv chav ua noj lossis chav dej, nco ntsoov hnav hnab looj tes, qhib qhov rai lossis qhib lub kiv cua kom tsis txhob nqus tau cov pa tshuaj lom neeg ntau dhau;
Zam kev tshuaj dawb tso cov tawv nqaij thiab qhov muag, nrog rau kev zam qhov tsis hnov tsw ntawm cov pa tshuaj ua kom hmoov;
Tsis txhob muab tshuaj dawb thiab lwm yam tshuaj ntxuav, tshwj xeeb yog cov neeg muaj ammonia;
Thaum siv lub qhov cub siv los ntxuav cov khoom, nco ntsoov siv cov npog qhov muag, hnab looj tes thiab lub tsho ntev, tsis txhob siv cov tshuaj ntxuav alkali, thiab ua kom muaj qhov cua;
Thaum siv cov tshuaj ntxuav tes uas muaj cov tshuaj tua kab mob, hnav hnab looj tes kom tsis txhob kub ntawm daim tawv nqaij.
