Hauv kev lag luam, yuav muaj ntau lub hnab ntim khoom, cov hnab ntim khoom no muaj peev txheej ntau, thiab hauv cov thawv lossis chaw lag luam siv ntau heev, vim tias txoj haujlwm siv rau kev thauj khoom, tom qab ntawd kev tsim tawm ntau ntau lub hnab, tseem muaj ntau yuav tsum rau txheej txheem. Feem ntau hais lus, tons ntawm hnab muaj ntau yam zoo. Piv txwv li, thaum tsim tons ntawm hnab, lawv yog cov tsim nyog thiab kev nyab xeeb thiab ruaj khov.
Hauv kev npaj lub thawv ntim, peb yuav tsum ua tib zoo xav txog cov kev thiab cov hau kev rau cov neeg siv khoom lub hnab ntim khoom, xws li nqa khoom, thauj khoom, thauj khoom thauj khoom, thiab lwm yam. Tsis tas li ntawd, peb yuav tsum xav txog seb nws puas yog rau kev ntim zaub mov, thiab seb nws yog non-toxic thiab tsis muaj mob rau cov zaub mov ntim. Cov khoom ntim sib txawv thiab cov sib txawv ntawm kev sib khi. Tons ntawm lub hnab, xws li cov hmoov lossis cov tshuaj lom, thiab cov khoom lag luam ntshai tsis muaj paug, muaj cov kev cai nruj heev rau kev ua haujlwm sealing. Cov khoom siv ziab yooj yooj yim los yog cov pwm hauv cov pwm kuj tseem muaj qhov tshwj xeeb ua kom cov cua nruj. Xyuam xim rau cov cawv ntawm cov txheej txheem thev naus laus zis thiab tshuab xaws ntawm kev ntim khoom tau.