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A method of restoring the natural colour to freeze-dried products
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An adjustable needle valve for vacuum installations
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An electrical measuring instrument
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Mechanical vacuum pump
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High-frequency generators for mass spectrometers
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Improvements relating to valve seals
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Pump
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Vacuum gauge apparatus
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Improvements in the production of reinforced plastics components
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Improvements relating to mass spectrometer tubes
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Diffusion vacuum pump apparatus
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Improvements relating to condensation pumps
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Vacuum pump apparatus
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Vacuum pump apparatus
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Vacuum gauge including a cold cathode ionization tube
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High vacuum system method and apparatus
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Improvements relating to injection moulding
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Improvements relating to valves for metering minimal gas volume
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Improvements in or relating to vacuum pumping sets
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Improvements in or relating to ion getter pumps
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