... wearing parts 2 years 3. Security and reliabil Mill Equipment For Making Gypsum Powder 1.Components HGM series micro powder ... main unit, classifier, powder collector, dust cleaner, blower, muffler, sound-proof room, crusher, bucket elevator, storage hopper, and vibrating feeder ... bearing and each dial are driven by electromotor of main equipment through reducer, and all the grinding rollers are rolling ...