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Sigma KEE - Cycle
KB Term: 

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週期
Cycle is a class of wheeled, pedal-driven UserPoweredVehicles that are designed to be ridden on roads or trails.
Relationships      
Parents 代理動力車輛 A Vehicle which is powered by one or more of its passengers or driver, for example, a Bicycle.
  陸地車輛 LandVehicle is the class of TransportationDevices that travel on land. The two main types of LandVehicle are RoadVehicle and RailVehicle. Note that this includes vehicles which travel on any solid surface, including a frozen body of water or snow.
Children 自行車Bicycle is a class of two-wheeled, UserPoweredVehicles.


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