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Visagraph
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Thesaurus
Boston type
New York point
Optacon
Pathsounder
Seeing Eye dog
Visotoner
cane
embosser
guide dog
high-speed embosser
line letter
noctograph
optophone
personal sonar
sensory aid
sight-saver type
string alphabet
talking book
ultrasonic spectacles
visagraph
writing frame
writing stamps
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