communication equipment (namely, receivers, intercoms, public address systems comprised of microphones, intercoms, and speakers; and push-to-talk and vox switched units to interface with transceivers) [ and electronic personal alert safety devices and biorhythm monitors, ] for use with safety equipment such as self contained breathing apparatus used by rescue workers; namely, firefighters, mine workers, and the like

'address':7 'alert':31 'apparatus':47 'biorhythm':35 'breath':46 'communic':1 'compris':9 'contain':45 'devic':33 'electron':29 'equip':2,41 'firefight':53 'intercom':5,12 'interfac':25 'like':58 'microphon':11 'mine':54 'monitor':36 'name':3,52 'person':30 'public':6 'push':17 'push-to-talk':16 'receiv':4 'rescu':50 'safeti':32,40 'self':44 'speaker':14 'switch':22 'system':8 'talk':19 'transceiv':27 'unit':23 'use':38,48 'vox':21 'worker':51,55

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