Kev lag luam tsheb yog cov concentrated siab thiab tshiab kev lag luam thev naus laus zis, raws li hom kev tsim khoom siab heev, laser hauv cov teb chaws tsim muaj nyob hauv Europe thiab peb muaj 50% ~ 70% ntawm lub tsheb qhov chaw ua tiav los ntawm laser ua, tsheb kev lag luam feem ntau yog laser. txiav thiab laser vuam raws li lub ntsiab txhais ntawm kev ua, suav nrog 2D txiav vuam, 3D txiav vuam.