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单词	pitch cylinder
释义	pitch cylinder noun : a cylinder that constitutes the pitch surface of a spur gear Word History Etymology pitch entry 4
随便看	bicycle gear bicycle kick bicycle shorts bicycle taxi bicycled bicycler bicyclers bicycles bicyclic bicycliccer bicycliccest bicyclicer bicyclicest bicycling bicyclist bicyclists bicyclo- bicylindrical bid bid ale bid fair bid in bid off bid price bid up

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