EQUIPMENT FOR TEACHING TELEPHONE COMMUNICATION TECHNIQUES, NAMELY, CUSTOM MANUFACTURED TELEPHONES, AUDIO CASSETTE RECORDERS, AND CONTROLS FOR LINKING THE TELEPHONES WITH THE AUDIO CASSETTE RECORDERS; PRERECORDED AUDIO CASSETTE TAPES FEATURING INSTRUCTION IN TELEPHONE COMMUNICATION TECHNIQUES; AND INSTRUCTION BOOKS AND MANUALS SOLD THEREWITH

'audio':11,22,26 'book':37 'cassett':12,23,27 'communic':5,33 'control':15 'custom':8 'equip':1 'featur':29 'instruct':30,36 'link':17 'manual':39 'manufactur':9 'name':7 'prerecord':25 'record':13,24 'sold':40 'tape':28 'teach':3 'techniqu':6,34 'telephon':4,10,19,32 'therewith':41

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