42 PRODUCT RESEARCH AND PRODUCT DEVELOPMENT SERVICES FOR OTHERS, IN THE FIELD OF TRANSFORMER RINGS, PRESSURE RINGS, PRESSURE WASHERS, PRESSURE ROLLERS, PRESSURE BLOCKS, TRANSFORMER SHEET MATERIAL, MAGNET FRAMES, YOKES, TRESTLES, BUSBARS, RAIL CONNECTION BLOCKS, SHOE BEAMS, FISH PLATES; SPRINGS, LEAF SPRINGS, BEARING; WOODEN POWER PLATES, WOODEN MOULDS; PICKING STICKS, SHUTTLE BLOCKS; SHEETS OF COMPRESSED WOOD FOR BUILDING PURPOSES; TRUSSES, RAFTERS, FRAMES, CARRIERS FOR SPANS, TIMBER JOINTS, CROSS BEAMS; AND TABLE TOPS