72450437
Mar 5, 1973
Sep 24, 1974
COMMINUTING MACHINES, IN PARTICULAR TUBE MILLS; MIXING AND HOMOGENIZING MACHINES, IN PARTICULAR STATIONARY OR PORTABLE STEEL RECEPTACLES FOR MIXING AND HOMOGENIZING FINELY DIVIDED MATERIALS BY AIR FLOW; TRANSPORTING APPARATUS, NAMELY STEEL CONDUITS AND CASING SECTIONS OF POROUS CERAMIC MATERIAL FOR AIR-FLOW CONVEYING, BELT CONVEYORS, BUCKET CONVEYORS
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