1gravity de-stoner 2,Remove stone from seed/grain 3,big sieve ... ,corn,coffee bean Introduction: 1, QSC-6 Blowing Style de stoner/gravity de-stoner 2, It is to separate stone, clod by ... transducer, which using different frequency for small particles of material (millet), medium materials (mung bean, soybean), large granular materials (kidney beans ...