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Improvements in or relating to a variable friction gear
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Improvements in or relating to infinitely variable friction wheel gears
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Improvements in infinitely variable friction wheel gears
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Infinitely variable friction wheel gears
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Improvements in infinitely variable friction wheel gears
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Improvements in infinitely variable friction wheel gears
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Infinitely variable friction wheel gear
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Shaffing for power transmission in motor-driven vehicles
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Friction wheel gear
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Friction gearing
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Improvements in and relating to friction wheel gears
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Improvements in variable-speed gearing
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Improvements in hydraulic ratchets
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