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- W2046775057 abstract "Abstract Selector equipment has been developed to sort specific data on corrosion and metal protection topics from an extensive abstract reference library. The original data are coded and punched on cards which are photographed on 16mm film. In the selection operation, the film is scanned at 200 frames per minute by a light beam and photo-electric cell. Correspondence of code patterns with holes in a pre-punched search card “blacks out” the photo-electric cell and registers the serial number of the relevant reference on a paper strip. The principles of operation, lay-out, advantages and limitations of a prototype machine are described. 2.4.4" @default.
- W2046775057 created "2016-06-24" @default.
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- W2046775057 date "1959-05-01" @default.
- W2046775057 modified "2023-09-24" @default.
- W2046775057 title "Photoelectric Information Selector" @default.
- W2046775057 doi "https://doi.org/10.5006/0010-9312-15.5.47" @default.
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