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Diesel engine fuel gauges; diesel engine and engine measurement devices and displays, namely, speedometers, tachometers, fuel level gauges, oil temperature gauges, oil pressure gauges, rail pressure gauges, pyrometers, axle load gauges for sensing pressure on axles and translating to weight values, fuel pressure gauges, manifold pressure gauges, air pressure gauges, vacuum gauges, water temperature gauges, turbo pressure gauges, turbo boost gauges, hourmeters, voltmeters, ammeters, electronic engine control modules, turbo temperature monitors, low water alarms, pressure sensors, temperature sensors, fuel level sensors, liquid level sensors, electronic switches, temperature switches, electric water level probes; engine pressure gauges