41 21 00 Conveyors
41 21 23.53 Postal Conveyors
41 21 13 Automatic Guided Vehicle Systems 41 21 23 Piece Material Conveyors 41 21 23.13 Belt Piece Material Conveyors 41 21 23.16 Container Piece Material Conveyors 41 21 23.19 Drag-Chain Piece Material Conveyors 41 21 23.23 Hopper Piece Material Conveyors 41 21 23.26 Monorail Piece Material Conveyors 41 21 23.29 Power and Free Piece Material Conveyors 41 21 23.33 Reciprocating Piece Material Conveyors 41 21 23.36 Roller Piece Material Conveyors 41 21 23.39 Vibratory Piece Material Conveyors 41 21 23.43 Walking-Beam Piece Material Conveyors 41 21 23.46 Weigh-Belt Piece Material Conveyors 41 21 23.53 Postal Conveyors 41 21 26 Piece Material Diverter Gates 41 21 29 Piece Material Gravity Slides 41 21 33 Piece Material Transfer Cars 41 21 36 Piece Material Turntables 41 21 39 Piece Material Feeders 41 21 39.13 Piece Material Vibratory Feeders