9 Fire alarm equipment and apparatus, namely, fire control panel, smoke detectors, thermal detectors, flame detectors, CRT display, alarm bells, and call boxes; Fire extinguishing equipment and apparatus, namely, fire alarm control panels, sprinkler heads, drencher heads, foam heads, CO2 gas fire extinguishers; [ MATV (master antenna television) and CATV (cable television) equipment and apparatus, namely, television headends, trunk-amplifiers, bridging-amplifiers, tap-offs, splitters and transformers; inductors installed at an exit to an evacuation stair way or an emergency exit leading to the outside, and adapted to permit manual unlocking in case of emergency; ] Electric batteries; [ smoke and fire dampers, access control systems comprised of magnetic encoded card-readers and control panels, gas leak alarm system comprised of gas leak detectors, sensors, and control panels, intruder detection system comprised of intruder detectors, sensors, and control panels; ] signal lamps used as emergency exit lights in fire alarm systems