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TABLE STRUCTURES FOR USE WITH JACKS IN RAISING AND LOWERING VEHICLE WHEELS IN PITS, LOCOMOTIVE HOISTS, LOCOMOTIVE SPOTTERS, CAR HOISTS, CAR WASHERS, TRACK EQUIPPED TABLE STRUCTURES FOR TRANSFERRING RAILWAY ROLLING STOCK BETWEEN TRACKS, BUS TURNTABLES, VERTICALLY ADN HORIZONTAL MOVABLE BRIDGES FOR CROSSING OVER RAILROAD TRACKS, RAILROAD CAR MOVING DEVICES, WINCHES, LOCOMOTIVE SANDING DEVICES, VACUUM GRIPPING DEVICES, TRAVELING CRANES, HANDPOWER CRANES, JIB AND PILLAR CRANES, GANTRY CRANES, TUMBLERS FOR CLEANING CASTINGS, LADLES FOR MOLTEN METAL, LADLE STOPPER OPERATING DEVICES, GEAR BRACKETS FOR TILTING LADLES AND PULVERIZERS FOR COAL AND OTHER MATERIALS