Cov ntawv thov:
Tiv thaiv kev tiv thaiv thiab kev tiv thaiv kom muaj kev sib xyaw rau ntau hom kev ntsuas thiab khoom siv.
Cov khoom siv kho mob xws li ntshav ntsuas thiab ntsuas tub yees cua sov.
Computer peripherals xws li laser printers.
Tua ntawm cov yas laminates.
Cov khoom siv yees duab.
Cov khoom lag luam semiconductor.
Thermal hloov khoom siv
Drums thiab lwm cov hlab ntsha thiab tswj kev tswj thiab kev txuag asphalt.