... developed and manufactured the pneu-preussure roller mill, square sifter, self-vibrating sieve, horizontal wheat scourer, plane rotating sieve, gravity classification sieve ... (including 2 sets of 3B.4B.1M)Technical art of wheat cleaning system 3Sieving, 2Beating, 2Destoning, 3Magnetic Separating, 1Damping 200TParameter Complete ...