... hopper, hoist, iris valve and an upper mobile cross bar for lifting of the filled up ... produce the whole system equipment of powder and grain, bulk device, HQ in HongKong, and we ... System, Mechanical Coveying System, Unload System, small bag unloader, small bag emptying small bag dump station, auto ... auto small bag dump station, big bag unloader, bulk bag unloader, big bag emptying, big bag dump station ...