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A kind of gear ring inputs the full-automatic multi-shifting speed variator of Two-wheeled
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A kind of bicycle drive for mitigating car body weight
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A kind of centre wheel inputs the shift transmission of manual shift two
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A kind of transmission shaft output speed variator
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A kind of manufacture method of bicycle housing
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A kind of centre wheel inputs two shift transmissions
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Bicycle gear shifting device
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Swinging and steering structure of vehicle
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Frame structure of vehicle
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Compound type frame structure
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Front-and-rear axle structure of vehicle, and vehicle with same
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Transmission and vehicle thereof
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Gear shifting device and vehicle with same
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Speed change device and bicycle with same
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Light-weight speed changing device and bicycle adopting light-weight speed changing device
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Pedal mechanism with double overrunning clutches and bicycle with pedal mechanism
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Reciprocating drive system of rickshaw
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Back shaft assembly of three-wheel or four-wheel vehicle driven by manpower or other power
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Speed changing mechanism
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Transmission mechanism of bicycle
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