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Device for preparation of film material for storage
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Process for preparing cellulose triacetate
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Single-membrane capacitor microphone with cardioid directional pattern
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Method of drying photographic paper with barite or polyethylene backing
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Geneva movement
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High-fidelity microphone
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Device for alignment control of the optical illuminating system of a motion-picture projector
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Matese mechanism
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Method and apparatus for ultrasonic grinding
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Method of chemical and photographic processing of cine films
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System for automatic control of electrolysis of fixing solution in continuous mode
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