Ntau qhov kev sib cais loj ntawm cov khoom siv hauv tsev

Cov khoom siv hauv tsev tuaj yeem muab faib ua cov txheej txheem, cov khoom zoo nkauj thiab qee cov ntaub ntawv tshwj xeeb. Cov ntaub ntawv khoom siv suav nrog ntoo, xyoob, pob zeb, cement, pob zeb, hlau, cib, ceramics, iav, engineering plastics, cov ntaub ntawv sib xyaw, thiab lwm yam.; cov khoom siv kho kom zoo nkauj suav nrog ntau cov xim txheej, xim tsev, plating, veneer, vuas ntawm ntau yam xim, thiab cov teebmeem tshwj xeeb Cov iav, thiab lwm yam; cov ntaub ntawv tshwj xeeb hais txog kev tiv thaiv dej, noo-pov thawj, tiv thaiv xeb, hluav taws kub, nplaim taws rov qab, suab rwb thaiv tsev, tiv thaiv kub, tiv thaiv kub, ntim khoom, thiab lwm yam.