Tshiab Tsim Rau Tsheb ciav hlau Conveyor

Qhov kev thov rau tsheb ciav hlau conveyor yog nce nyob rau xyoo no. Ib qho sib dua yog hloov qhov qub hnyav. Nws yooj yim heev rau kev khiav lag luam.