Audio-receivers and video-receivers; Burglar alarms; Central processing units (CPU); Electric door bells; Fire alarms; Locks, electric; Loudspeakers; Smoke detectors; Video baby monitors; Video telephones; Walkie-talkies; Whistle alarms; Electric buzzers; Magnifying peepholes for doors

'alarm':9,18,33 'audio':2 'audio-receiv':1 'babi':25 'bell':16 'burglar':8 'buzzer':35 'central':10 'cpu':13 'detector':23 'door':15,39 'electr':14,20,34 'fire':17 'lock':19 'loudspeak':21 'magnifi':36 'monitor':26 'peephol':37 'process':11 'receiv':3,7 'smoke':22 'talki':31 'telephon':28 'unit':12 'video':6,24,27 'video-receiv':5 'walki':30 'walkie-talki':29 'whistl':32

SMTVDP

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