Ntau lub tsev tsim cov lej sau cov xov tooj uas tuaj yeem siv rau txhua hom qhov rooj thaum muaj xwm txheej kub ntxhovCov. Feem ntau cov lej tsim tsa tsis pub rau cov xauv ntxiv kom muab tso rau ntawm lub qhov rooj nrog cov khoom siv ceeb toom lossis ntaus thaum muaj xwm ceev. Tso cov saw hlau lossis tuav ntawm lub qhov rooj kom kaw nws yog kev ua txhaum cai ntawm lub tsev tsim tsev feem ntau.
Txog kev tawm tsam muaj xwm ceev, muaj peb hom kev kho vajtse thiab cov xauv uas tuaj yeem ntsia tau hauv kev ua raws li lub tsev muaj kev nyab xeeb. Cov no yog egress pub dawb, ncua kev ntxhov siab thiab raug tswj hwm egress.
