23 [ GAS TURBINES; ] GYRATORY FINE GRINDERS; AUTOGENOUS MILLS; FINISHED CASTINGS OF FERROUS AND NON-FERROUS METALS-NAMELY, ENGINE PARTS, CRUSHER PARTS, GRINDING MILL PARTS, [ HYDRAULIC PRESS PARTS, ] RAILWAY TRACKWORKING MACHINERY PARTS, MANGANESE AND ALLOY WEARING PARTS FOR MATERIAL REDUCTION MACHINES; TRACKWORKING EQUIPMENT, INCLUDING TIE PULLERS AND INSERTERS, [ TIE HANDLERS, ] TRACKLINERS, [ TRACK SURFACERS, TRACK SHIFTERS, ] SWITCH LINERS AND INDICATORS, TIE DRILLS, TIE SPACERS [ AND SPIKE STRAIGHTENERS, ] CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINES, [ PUMPING AND PIPE LINE INSTALLATIONS; ] MARINE ENGINE CONTROL SYSTEMS