Thaum xaiv txoj caitricone laum khoomrau tej yam kev mob drilling, xws lidej zoo drilling khoom, kev xaiv ntawm me ntsis yog cuam tshuam los ntawm cov qauv zoo, tsim hardness, thiab drilling tsis. Rau cov ntawv thov xws ligas drilling,mining tricone khoom, thiabroj zoo laum khoom, xaiv qhov raug laum me ntsis tuaj yeem txhim kho qhov zoo ntawm qhov drilling, efficiency, thiab txo cov nqi ua haujlwm.