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[ BALL BEARINGS, ROLLER BEARINGS, AND ] PLAIN BEARINGS; CAR PULLERS (POWER DRIVEN CAPSTANS OR WINCHES FOR PULLING CARS AND HEAVY LOADS, [ WARPING BOATS, ] AND OPERATING HOISTS); BELT CONVEYORS, [ GRAVITY DISCHARGE CONVEYORS, ] PAN CONVEYORS, FLIGHT CONVEYORS, BUCKET CONVEYORS, EN MASSE FLOW CONVEYORS, SCREW CONVEYORS, AND PARTS THEREOF FOR COAL AND THE LIKE; APPARATUS FOR ELEVATING, STORING, AND DISCHARGING COAL AND THE LIKE IN MINES, POWER PLANTS, AND LOCOMOTIVE COALING STATIONS; [ COAL TIPPLES; ] SKIP HOISTS; [ APPARATUS FOR CLEANING AND WASHING COAL; ] MACHINES FOR CRUSHING AND SIZING COAL, SUGAR, CHEMICALS, AND SIMILAR FRIABLE MATERIALS; [ CONVEYOR ELEVATORS FOR HANDLING LOADS SUCH AS BARRELS, SACKS, BOXES, AND SIMILAR WAREHOUSE RECEPTACLES; ] FEEDERS OF THE CONVEYOR TYPE FOR WITHDRAWING MATERIAL FROM BINS AND HOPPERS IN UNIFORM VOLUMES; GATES, VALVES, AND LOADING SPOUTS FOR CONTROLLING AND DIRECTING THE FLOW OF MATERIAL IN MATERIAL HANDLING EQUIPMENT; GLASS BATCH MIXERS, CONVEYORS, BUCKET ELEVATORS, AND SKIP HOISTS; [ FRICTION DRUM HOISTS, ] HAND DRIVEN HOISTS, SKIP TYPE HOISTS, AND POWER DRIVEN HOISTS OF GENERALLY MECHANICAL NATURE; HOPPERS AND BINS FOR MATERIAL HANDLING EQUIPMENT; JOURNAL BOXES, BELT PULLEYS, SHAFTING, AND DRIVE AND CONVEYOR CHAINS; MECHANICAL LOADERS AND UNLOADERS FOR CARS AND BOATS AND MATERIAL PILERS; [ MIXING PADDLES; MACHINES FOR WASHING SAND, STONE, ORE, AND THE LIKE; ] GEAR SPEED REDUCERS; VIBRATING SCREENS FOR SEPARATING MATERAL ACCORDING TO SIZE; [ POWER SHOVELS; ] AND GEAR TRANSMISSION MECHANISMS