Cov ntsia hlau feeder yog ib qho ntawm cov khoom tsim nyog rau lub teeb thiab hnyav kev lag luam xws li kev lag luam chemical niaj hnub, tsev muag tshuaj, khoom noj khoom haus, metallurgy, cov khoom siv hauv tsev, kev ua liaj ua teb sab nrauv, thiab lwm yam. Nws muab kev ua haujlwm zoo, kev thauj mus los, txhim khu kev qha zoo thiab ruaj khov, thiab nyob rau hauv lub Cov txheej txheem pub mis Cov ntaub ntawv raw yog kiag li tsis muaj dej noo, muaj kuab paug, khoom txawv teb chaws, thiab to.