– equipment, devices, systems ( ) intermediary electronic transformations, manufacture of electronic valves and tubes and other electronic components ( ) manufacture of accumulators, primary cells and primary batteries ( ) manufacture of aerials, aerial transmitters ( ) manufacture of audio gear, sound...
device, or on a computer running call recording software . the recording, whether overt or covert, may be started manually, automatically by detecting sound on the line ( vox ), or automatically whenever the phone is off the hook. using an inductive coil tap (telephone pickup coil) attached to the handset...
, and thus communicate with his wife who was an invalid . meucci separated the two directions of transmission in order to eliminate the so-called "local effect", adopting what we would call today a -wire-circuit. he constructed a simple calling system with a telegraphic manipulator which short-circuited...
communication systems that achieved worldwide popular usage starting in the s. [ ] [ ] [ ] the master patent for the photophone ( u.s. patent apparatusfor signalling and communicating, called photophone) was issued in december , [ ] many decades before its principles came to have practical applications...
and professional audio/video at the integrated systems europe trade fair. our experts are at your disposal at the new and even larger cordial booth #c in hall and they'll be happy to provide you with help and advice for all questions around the topic professional cable installations. from tuesday, february...
charts ecg recording paper economy sphygmomanometers electro medical equipments electro medical products electronic stethoscopes endoscopic coupler ent equipments examination tables fia apparatus filter for dental applications filter for hospitals foaming apparatus gamma ray detectors gamma ray monitors...
charts ecg recording paper economy sphygmomanometers electro medical equipments electro medical products electronic stethoscopes endoscopic coupler ent equipments examination tables fia apparatus filter for dental applications filter for hospitals foaming apparatus gamma ray detectors gamma ray monitors...
charts ecg recording paper economy sphygmomanometers electro medical equipments electro medical products electronic stethoscopes endoscopic coupler ent equipments examination tables fia apparatus filter for dental applications filter for hospitals foaming apparatus gamma ray detectors gamma ray monitors...
charts ecg recording paper economy sphygmomanometers electro medical equipments electro medical products electronic stethoscopes endoscopic coupler ent equipments examination tables fia apparatus filter for dental applications filter for hospitals foaming apparatus gamma ray detectors gamma ray monitors...
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