1. Nws muaj peev xwm ua tau ntau yam ntawm cov hlau thiab cov ntaub ntawv tsis-hlau. Qhov tshwj xeeb tshaj plaws, npav siab, siab melting point thiab brittle cov ntaub ntawv yog qhov zoo dua.
2, teej tug mus rau cov tsis ua haujlwm, tsis muaj kev puas tsuaj rau cov khoom, tsis muaj cov khoom coj, zoo kos zoo.
3. Lub nqaj laser yog nyias, kev siv cov khoom noj khoom haus me me, thiab kev ua cov cua sov ua rau thaj tsam me me.
4, kev ua haujlwm siab, kev tswj xyuas computer, yooj yim kom ua tiav automation.
