Scope ntawm daim ntawv thov: roj hmab, yas, hlau thiab cable, khoom siv hluav taws xob, khoom siv ua kis las, log tsheb, cov khoom siv iav, cov khoom siv tawv tawv, cov hmoov hlau metallurgy, cov khoom sib nqus, cov ntsaws ruaj ruaj, ceramics, daim txhuam cev, EVA cov ntaub ntawv, cov ntaub ntawv foaming, cov ntaub ntawv alloy, cov ntaub ntawv sib txhuam, tshiab cov ntaub ntawv tshawb fawb, roj teeb cov ntaub ntawv, kev tshawb fawb kuaj.