23 IRON AND STEEL WORKS AND FOUNDRY EQUIPMENT-NAMELY, JACK CARS FOR REMOVING BOTTOM PLUGS FROM CONVERTERS, CAST IRON SLAG LADLES, CAST IRON OR FABRICATED STEEL HOT METAL LADLES, SLAG POTS, HOPPERS, MACHINES FOR SHAKING OR ROTATING LADLES CONTAINING HOT METAL, CONTINUOUS CASTING MACHINES, SINTERING MACHINES, TRAVELLING GRATES, CRUSHERS, ROLLING MIXING AND QUENCHING DRUMS ALL FOR SINTERING MACHINES, ROLLING MILLS, BILLET INSPECTION DEVICES, ROLLER TABLES, COOLING BEDS, MACHINES FOR HANDLING AND TURNING BILLETS, BLOOMS, BARS, BEAMS AND OTHER ROLLED PRODUCTS, SHAKER CONVEYORS FOR CHARGING FURNACES OR FOR REMOVING SCALE, COILERS TO RECEIVE STEEL STRIP FROM THE MILL, MACHINES, FOR DISCHARGING, HANDLING AND CONVEYING COILS OF STRIP, GANTRIES FOR USE WITH STEEL FURNACES, BELT AND SHAKER CONVEYORS FOR USE IN MINES, QUARRIES, BRICKWORKS AND ON WASTE HEAPS, HEAVY DUTY ROLLER TABLE CONVEYORS, DUCKBILL LOADERS, ROCK BORING MACHINES, CONTINUOUS MINERS AND TUNNELING MACHINES