Tus menyuam roj hmab pwm yog dab tsi?

Cov khoom ua si pwm tsim ib chav kawm ntawm cov pwm nrog cov duab tas luav xws li cov cim lossis tsiaj. Cov pwm no muaj qhov tsis tshua muaj qhov tseeb thiab zoo nkauj tsos, thiab ntau yam ntawm lawv yog carved (tam sim no cov tshuab tau tsim, thiab lawv kuj tau ua tiav los ntawm CNC), yog li muaj cov lus no. Cov pwm sib thooj yog lub tsheb pwm, uas yog, cov qauv ntawm lub tsheb thiab cov nkoj yog siv los ua pwm ntawm cov khoom.