Electric audio playback units; Sound and video recording and playback machines; Downloadable audio recordings featuring educational content for museum exhibits, historic sites, and art galleries

'art':24 'audio':2,13 'content':17 'download':12 'educ':16 'electr':1 'exhibit':20 'featur':15 'galleri':25 'histor':21 'machin':11 'museum':19 'playback':3,10 'record':8,14 'site':22 'sound':5 'unit':4 'video':7

providing online non-downloadable audio recordings featuring educational content for museum exhibits, historic sites, and art galleries

'art':17 'audio':6 'content':10 'download':5 'educ':9 'exhibit':13 'featur':8 'galleri':18 'histor':14 'museum':12 'non':4 'non-download':3 'onlin':2 'provid':1 'record':7 'site':15

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