Lub qhov rais tsau yog tsuas yog rau lub teeb pom kev zoo thiab saib lub hom phiaj. Nws yog ib hom ntawm lub qhov rais ruaj khov nyob rau hauv uas lub qhov rais iav yog embedded nyob rau hauv lub qhov rais thav duab thiab lub sash tsis tau qhib thiab kaw.
Vim lawv cov dej ntshiab huv, cov qhov rais ruaj khov tuaj yeem tsim tau ntau yam duab los tsim cov vaj tsev zoo nkauj tag nrho ntawm tus cwj pwm. Txij li nws tsis tuaj yeem qhib thiab kaw, nws yog qhov yuav tsum tau xav txog yuav ua li cas ntxuav nws.
Lub qhov rais ruaj khov muaj qhov pom yooj yim thiab siv dav hauv ntau lub tsev