Electro-acoustic apparatus, particularly electro-acoustic transducers, radio receivers, acoustic couplers, digital sound processors, signal processors; amplifiers; audio amplifiers; optical disk players for CDs; electronic apparatus, namely, audio mixers, audio mixing apparatus in the nature of audio mixers, audio receivers; computers for transmitting signals; electric cables; thermionic tubes

'acoust':3,8,12 'amplifi':19,21 'apparatus':4,28,34 'audio':20,30,32,39,41 'cabl':48 'cds':26 'comput':43 'coupler':13 'digit':14 'disk':23 'electr':47 'electro':2,7 'electro-acoust':1,6 'electron':27 'mix':33 'mixer':31,40 'name':29 'natur':37 'optic':22 'particular':5 'player':24 'processor':16,18 'radio':10 'receiv':11,42 'signal':17,46 'sound':15 'thermion':49 'transduc':9 'transmit':45 'tube':50

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