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Device for fixing toner images
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Registering device
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Startstop tape transport
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Liquid ferrographic developer
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Alphanumeric printer
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Magnetic record medium for ferrography
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Liquid convex meniscus forming method
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Magnetic substance indicator
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Apparatus for electromagnetic recording of image
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Device for developing hidden magnetic picture
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Information disply
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Magnetic record carrier
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Inverter
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Data display device
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Wire magnetic head assembly
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Indicator
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Ferrographic record carrier working layer
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Information display
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Device for demagnetizing magnetic record carrier
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Light pen stylus
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