9 Scientific, electrical and electronic apparatus and instruments for detecting, extinguishing or suppressing fires of explosions, namely, electromechanical, mechanical, electrical, electronic, optical and thermal sensors and controls, temperature detectors, and thermal responsive switches, all for use in measuring, detecting and indicating temperature or overheat; fire extinguishers; optical scanners and sensors for detecting light-obscuring substances; apparatus and instruments for detecting flame, smoke and gas, namely, flame detectors, smoke detectors, and gas detectors; breathing apparatus, namely, oxygen masks not for medical use; safety and life-saving apparatus, namely, inflatable rafts, inflatable belts, inflatable bags which form buoyant floats for supporting disabled aircraft, and inflation apparatus for use therewith; gauges and meters for use in relation to the monitoring, measuring, charging and refilling of containers and cylinders with gas, including compressed gas; control valves for regulating the flow of gas; fire alarms; fire blankets; safety equipment, namely, fire escape ladders; fire hose nozzles; fire sprinklers; fire trucks; life belts; life jackets; life nets; life preservers; life-buoys; life-saving rafts; and parts for all the aforesaid goods; computer operating software namely, software programs which simulate residential, commercial, or industrial fires by operating gas-fueled burners, smoke generators, and ventilator fans and vents, and by monitoring room temperatures, ventilation, fire intensity, and extinguishing effectiveness