fuels

mechanical mixing machines; internal combustion engines for machine operation, and parts therefor; air and fuel filters, catalytic converters and fuel, oil and water pumps for motors and engines; machines for injecting and blending additives in fluid streams, and parts therefor

electronic controls for treating engine exhaust; fuel, oil and water meters; sensors to measure chemical properties, flow and temperature of fuels, lubricants, oil and water; computer hardware and operating programs for monitoring and operating internal combustion engines