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nature : for a particle size separation equipment. The main part of the metal wire (or silk, and other materials) into the net, or wear a lot of holes in metal plates. Cake can be circular, rectangular form side. According to the methods of operation can be divided into fixed sieve and sift two campaigns. Fixed screen is only applicable to low production capacity of occasions, with the advantage of simple equipment and operation easy. For example, fixed-screen grid. Campaign Screen is widely used in mass production. On-screen can be divided into drum sieve - sieve analysis of peace, the former disc, and the chain-cylinder, which have shaken-type and toss so.
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