TELEPHONIC INSTRUMENTS AND APPARATUS [ AND FOR RADIO APPARATUS, PARTS, AND APPURTENANCES ] -NAMELY, TELEPHONIC RECEIVING AND TALKING INSTRUMENTS, SIGNALING AND SIGNAL-RECEIVING INSTRUMENTS, TELEPHONIC SWITCHBOARDS, TELEPHONIC CENTRAL-EXCHANGE APPARATUS, TELEPHONIC LINE APPARATUS [ , CIRCUIT-PROTECTING DEVICES, ASSEMBLED RADIO RECEIVING SETS, HEAD SETS, LOUD SPEAKERS, TRANSFORMERS, VACUUM TUBES, PLUGS, JACKS, AND ELECTRICAL CONDENSERS ]

'apparatus':4,8,30,33 'appurten':11 'assembl':38 'central':28 'central-exchang':27 'circuit':35 'circuit-protect':34 'condens':53 'devic':37 'electr':52 'exchang':29 'head':42 'instrument':2,17,23 'jack':50 'line':32 'loud':44 'name':12 'part':9 'plug':49 'protect':36 'radio':7,39 'receiv':14,22,40 'set':41,43 'signal':18,21 'signal-receiv':20 'speaker':45 'switchboard':25 'talk':16 'telephon':1,13,24,26,31 'transform':46 'tube':48 'vacuum':47

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