DIAZO COPYING MATERIAL
PURPOSE:To prevent an image from being plagiarized or forged by forming either of character parts and other parts in dots to 120 lines per inch and the other part to 80 lines per inch. CONSTITUTION:Dot printing has two methods; (1) character parts of a latent image consist of dots of 80 lines per in...
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Format: | Patent |
Sprache: | eng |
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