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Improvements introduced in the preparation of carbonate fuels
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Improvements relating to carbonaceous fuels
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Improvements in or relating to the combustion of heating fuel oils
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Method of operating an internal-combustion engine
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Method for operating an internal combustion engine
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Method of increasing solubility of metal salts of beta carboxy compounds in motor fuels
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Method of operating an internal combustion engine
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Lubricating oil
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Spark plug
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Spark plug
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Engine operating method
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Methods of operating internal combustion engines
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Methods of increasing combustion efficiency and compositions therefor
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