Shaping noise in power amplifiers of duplex communication systems
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Compact health grill
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Photo-voltaic unit for use in roof of e.g. industrial halls, has temperature control effecting cooling or heating of unit such that constant temperature is maintained, and cooling body designed as hollow body via which medium is supplied
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Convection baking oven - has upwards diagonal air flow to expand usage to baking large loaves
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Air valve in base of spray can - has valve for connection hand pump to operate spray
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Method and device for baking
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Aluminium-metal spectacle centre part made from one piece
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Sail-board with sail between two mast-elements - has spreading and holding gear linked to both mast elements, one of which is mounted adjustably
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Tooth structure for burr-free cutting saw blade
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Oval table with double sided table top - has swivel fitments allowing easy reversal of top to reveal games board side
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Combined brake and accelerator pedal - has single lever pivoted about centre and sprung toward braking position
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Improvements in or relating to dust-laden air filter installations
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Cleaning of flexible gas filter tubes
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Improvements in or relating to sleeve-type gas fitter plants
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Improvements in the cleaning of air filter tubes
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Cleaning of flexible gas filter tubes
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Improvements in or relating to machines for shaping spur gears
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Improvements in electric switch mechanism for use in road vehicles, motor boats and aircraft
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Improved Method of Manufacturing Electric Steel Castings.