41 13 00 Bulk Material Feeders
41 13 23.23 Screw Bulk Material Feeders
41 13 13 Bin Activators/Live Bin Bottoms 41 13 23 Feeders 41 13 23.13 Airlock Bulk Material Feeders 41 13 23.16 Apron Bulk Material Feeders 41 13 23.19 Rotary-Valve Bulk Material Feeders 41 13 23.23 Screw Bulk Material Feeders 41 13 23.26 Vibratory Bulk Material Feeders 41 13 23.29 Volumetric Bulk Material Feeders 41 13 23.33 Weigh Bulk Material Feeders