FIELD: size grading of materials. SUBSTANCE: device comprises shafts 1 with discs 2 spaced at a pitch of 0.02163-0.069 relative units and forming rectangular cells. Shafts 1 are rotated by drive 5. EFFECT: improved design. 2 dwg
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Authors
Dates
1994-06-30—Published
1991-09-27—Filed