Apparatuses for transmitting and reproduction of sound or images; magnetic data-carriers, discoid sound carriers; equipment for the processing of data, computers; life saving devices and equipment; extinguishers; equipment for fire protection; fire-alarms; smoke detectors; sprinkler systems; fire-resistant blankets; alarm systems; protective clothing and protective masks; systems and installations for extinguishing fires; exhaust nozzles and other equipment for the aiming of jets of water, stream, foam and such for the benefit of extinguishing fire; apparatus and equipment for controlling and extinguishing fire