Lub tshuab ntim khoom yog cov khoom siv sib xyaw ua ke hauv kev ua cov khoom siv hnyuv ntxwm. Nws lub hom phiaj yog kom sib tov ntau yam uas tsis yog-tus qauv granular nyoos nqaij thiab lwm yam khoom siv pabcuam raws li cov txheej txheem, kom cov khoom siv raw tuaj yeem sib xyaw kom tau raws li qhov xav tau ntawm cov khoom sib txawv. Nws yog siv los sib tov ntau yam filling, seasonings, thiab auxiliary khoom. Cov cuab yeej siv. Cov khoom sib xyaw ua ke yog tsim los ntawm ib lub thav duab, ib rab diav, tswj kev hloov, lub cev muaj zog, reducer, saw, thiab lwm yam. Nws yog qhov tsim nyog rau kev sib tov txhua yam khoom, tshwj xeeb tshaj yog cov nqaij ntim khoom.