1. Hlau, uas tsis yog-metallic ntaub ntawv uas yuav siv tau rau ua. Tshwj xeeb tshaj yog rau siab hardness, siab melting point, cim txawm ntau zoo rau nkig cov ntaub ntawv.
2. yuav mus rau qhov uas tsis yog-hu rau tus txheej txheem, tsis muaj ua kom cov khoom, cuab tam coj, marker-free zoo zoo.
3. Cov laser beam yog zoo, ua cov ntaub ntawv noj yog me me, cov zauv me me thaum tshav kub kub-cuam tshuam cheeb tsam.
4. Cov high efficiency, qhov kev siv ntawm lub computer tswj thiab automation.
