infrared beam detectors for security; door contacts, sirens, horn alarms, strobe lights, people counters and warning bells, all used in association with security hardware; transformers, piezoelectric sounders; speakers and siren drivers; magnetic contacts, tamper switches, hold-up switches; garage door switches

'alarm':10 'associ':21 'beam':2 'bell':17 'contact':7,33 'counter':14 'detector':3 'door':6,41 'driver':31 'garag':40 'hardwar':24 'hold':37 'hold-up':36 'horn':9 'infrar':1 'light':12 'magnet':32 'peopl':13 'piezoelectr':26 'secur':5,23 'siren':8,30 'sounder':27 'speaker':28 'strobe':11 'switch':35,39,42 'tamper':34 'transform':25 'use':19 'warn':16

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