Tsuas nyob rau qhov siv rau cov ntaub khaum, tsev saj no tsis yog ib qhov chaw tshwj xeeb—nws yog ib qhov kev daws teeb meem rau kev lag luam uas nyob hauv qab zib txoj cai thiab kev tsim khoom. Los ntawm kev coj qhov saj sai, nws tuaj yeem tshem tawm qhov teeb meem ntawm qhov khaum (ribs) uas yuav raug ntxuav lossis muaj qhov sib txawv thaum saj sai. Qhov kev tshiab no pab ntau dua rau kev txhim kho txoj cai thiab tseem pab ntau rau cov khw kev lag luam tseem ceeb.
Hauv qhov kev lag luam ntaub ntawv zoo thiab kev lag luam ntaub ntawv, cov khwv muaj no yog ib qhov tseem ceeb rau kev txhim kho txoj cai. Yuav yog saj sai ntaub khaum zoo, ntaub ua haujlwm, lossis ntaub sov hauv hnub hauv, nws saj sai tau zoo thiab tseem tso qhov khaum zoo li cas los. Nws tshem tawm tag nrho qhov teeb meem zoo li ntaub khi, nqaij, lossis sib txawv hluas uas muaj los ntawm kev saj sai theej thaj, uas pab suav ntau rau qhov tsis zoo thiab qhov khawv tawm.
Rau kev pab txhim kho tawv thiab kev lag luam tshem tawv xeeb, cov cuaj no yog ib qhov khoom siv txaus zog rau kev kawm ntau dua rau kev pab tswv yim. Nws pab rov qhia lub teeb meem thiab daim ntawv looj tseem ceeb hauv tawv, ua rau nws muaj peev xwm tshaj tshua rau kev tshem tawv rau kev lag luam, kev nyiaj yuav, thiab khoom lag luam xeeb. Muab cov ntaub ntawv zoo tshaj plaws los pab rov qhia tawm, nws tuaj yeem pab txwv tsis pab tawm, thiab nws tuaj yeem pab tswj ntau yam khoom siv.
Nws kev siv los tseem tseem ceeb hauv kev tshem tawv thiab kev lag luam tshem tawv. Rau cov khoom loj li qhov rooj saib, rooj zaum, thiab rooj tshem, cov cuaj no pab tswj xyuas tias tawv tau raug ntxuav tas li, tsis pub muaj qhov chaw ntxuav ntau lossis tsis tas. Qhov no pab tswj lub teeb meem tseem ceeb, pab tswj lub color zoo, thiab pab nws nyob ntev, thiaj li pab tau kev nyiaj yuav tshaj tshua rau kev nyob hauv tsev.
Ntawm sis, cov kuab no tuaj yeem tsis tu ncua nyob rau hauv kev lag luam tshaj tshwv ntawm kev tsim kho cov ntaub hlua siv rau hauv qab rooj thiab hauv qab dej. Nws txiav txim siab tias cov ntaub twill siv rau qhov pib thiab hauv qab muaj qhov ntev thiab qhov tseeb meej meej tom qab siv kuab, kom txo cov ntaub los ntawm kev ruaj thiab kev puas tsuaj ntawm qhov tseeb. Qhov tseeb no txiav txim siab tias cov ntaub tau txhua yam uas xws li kev daws tshaj tshwv hauv kev lag luam tshaj tshwv.
Thaum kawg, nyob rau hauv qhov chaw tshaj tshwv—xws li cov cuab yeej siv hauv qab neeg siv cov cuab yeej siv hlu ua lej, cov panel siv rau kev sov kab duag, thiab cov khoom siv zog tshaj tshwv muaj cov ntaub tshwj xeeb—cov kuab no muaj qhov ceev tshaj plaws. Nws pab tseg cov cuab yeej hlu ua lej thiab cov ntaub tshwj xeeb thaum siv kuab, pab tseg cov ntaub twill siv rau hauv qhov chaw tshaj tshwv.