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Automatic infinitely variablespeed drive
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Automatic infinitely variable-speed drive
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Elevator for liquids for feeding fuel to automobile engines
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Improvements in and relating to means for raising liquid fuel and the like
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Improvements relating to apparatus for raising liquids
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Improvements in or relating to distant liquid level indicating apparatus
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Improvements in or relating to distant liquid level indicating apparatus
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Improvements in or relating to distant liquid level indicating apparatus
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Fuel-feed device
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Improvements in vacuum apparatus for raising liquids
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Method and apparatus for indicating the level of liquid in a tank
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Method and apparatus for indicating the level of liquid in a tank
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