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Method of determining atmosphere density
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Synchronous detector
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Apparatus for measuring size and concentration of suspended particles
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Method of optimal signalling in fog
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D.c.electric drive
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Optronic device for measuring sizes and concentration of dispersed particles
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Method of determining hydrogen peroxide in aqueous solutions
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Device for preparing samples of vapour-gas mixture in equilibrium
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Device for measuring sizes and concentration of suspended particles
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Arrangement for measuring light diffusion properties of dispersed media
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Logical selector switch
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Photoelectric registrator of suspended particles
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