The use of the machine This machine is suitable for preliminary cleaning after uniform size seeds and food. It can be a variety of food such as grains and seeds through the replacement bench components: wheat, corn, rice, beans, barley, sorghum and vegetable seeds, etc. according to the proportion of size selection may be rotten bad grain, grain insects, black powder Bing Li, blighted grain, grain sprouts, grain and light impurities with glumes cleared out. After the selection of seed, its grain weight, germination rate, clarity, uniformity will have improved significantly.