Khaws rau hauv qhov chaw txias, qhuav thiab zoo-ventilated tsev rau khoom.
Tseg deb ntawm hluav taws thiab cov khoom cua sov.
Zam kev tshav ntuj ncaj qha.
Lub pob yog ntim.
Nws yuav tsum tau muab cais cais tawm los ntawm cov kua qaub thiab cov tshuaj noj, thiab kev sib xyaw sib xyaw yuav tsum tsis txhob zam.
Thaj chaw cia yuav tsum tau nruab nrog cov ntaub ntawv tsim nyog los muaj cov to.
