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GB449583A
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Improvements in apparatus for extracting weeds, roots or the like from the ground
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GB412407A
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Improvements in apparatus for extracting weeds roots or the like from the ground
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GB305744A
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Process for the treatment of solid carbonaceous material for the recovery of oils
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GB308995A
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Improvements in the destructive hydrogenation of carbonaceous materials
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GB243122A
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Improvements in and relating to the production of mixtures of nitrogen and hydrogen from ammonia synthesis
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GB242741A
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Improvements in and relating to the production of combustible gases
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GB330273A
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Improved method of and apparatus for producing nitric oxide
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AU91811B
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Improvements in methods of raising or forcing liquids andin apparatus therefor
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AU1080608B
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Improvements in and relating to ignition arrangements for internal combustion engines andother purposes
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AU1202908B
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Improvements in methods of raising or forcing liquids and in apparatus therefor
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