Qhov no yog pob khawm hlau nyuaj enamel tus pin. Kev kho saum npoo siv cov txheej txheem nyuaj enamel kom raug sau cov xim. Cov tub hluas cov plaub hau, khaub ncaws, noog plaub, thiab lwm yam yog tag nrho ntawm cov xim thiab kev hloov ib txwm. Cov xim xiav, liab thiab lwm yam tones ntxiv ib leeg, nthuav qhia cov ntsiab lus ntawm tus qauv, ua rau daim duab zoo nkauj thiab peb sab, zoo li zaj dab neeg ntawm tus tub thiab tus noog yuav nthuav tawm rau pem hauv ntej ntawm koj txhua lub sijhawm.Tag nrho cov duab yog tshwj xeeb, nrog rau cov noog tawb raws li lub ntsiab thav duab, cov hlau kab qhia cov txheej txheem ntawm lub tawb, thiab cov txheej txheem hollowing cleverly tsim ib tug nkag siab ntawm qhov chaw, uas tsis tsuas yog khaws cov duab ntawm lub tawb, tab sis kuj tsis thaiv cov qauv sab hauv, ua rau cov paib nplua nuj nyob rau hauv cov khaubncaws sab nraud povtseg. Lub tawb qhov rooj, xauv thiab lwm qhov me me tau ua kom zoo nkauj ntxiv rau qhov tseeb thiab kev lom zem.
