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FSFZ series of impact loosening machine is an auxiliary equipment of the grinding. The machine impact the materials to achieve the powder pieces loose, to separate the endosperm adhering to the skin, which can increase the sieving powder rate by 30-35% to one time. This machine has the advantages of simple structure, good technological effect and convenient installation. It can be mounted, hoisted and also installed on the floor of the second to fifth. It is the necessary equipment for large, medium and small grade flour mills.