Worldwide distributor of NSN parts and consumables located in the USA.
An optical device consisting of one red and one blue-green lens set in a spectacle like frame, constructed in such a manner that the frame may be reversed, enabling the wearer to view with the red or blue-green lens to the left or right as desired. Produces a stereoscopic effect of depth and contour when used in analyzing aerial photographs and preparing maps based on such photographs.
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