Stone mill introduction: Stone mill is a machine used to process rice, wheat, beans and other grains into powder and pulp. At first, human or animal power was used. In the Jin Dynasty, my country invented water mills powered by water. Usually made from two cobblestones. The grinding mill has two flat layers, and the joints of the two layers have textures. The grain enters the middle of the two layers from the upper hole, moves outward along the texture, and is ground as it rolls across the two layers to form powder.
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