GASES AND GAS MIXTURES, ALL FOR USE AS FUELS AND AS ILLUMINANTS; INDUSTRIAL OILS AND GREASES (OTHER THAN EDIBLE OILS OR FATS, OR ESSENTIAL OILS); AND LUBRICANTS FOR ELECTRIC WIRE FEED MOTORS, TORCH VALVES AND NOZZLES, OXY-FUEL GAS CUTTING MACHINES, GAS VALVES, STOPCOCKS, O-RINGS, AND COMBUSTION RESISTANT LUBRICANTS FOR USE IN ATMOSPHERES CONTAINING HIGH CONCENTRATIONS OF OXYGEN