NASA NTRS · 20090041652
Six-Message Electromechanical Display System
Abstract
A proposed electromechanical display system would be capable of presenting as many as six distinct messages. In the proposed system, each display element would include a cylinder having a regular hexagonal cross section.
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Howard, Richard T.. 2007-05-01. Six-Message Electromechanical Display System. https://ntrs.nasa.gov/citations/20090041652
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