hypotrochoid

常见例句

• This engine utilizes the rotor round of epitrochoid and the outer rotor round of hypotrochoid the structure of combination, which does not need crankshaft, linkage and gas distribution agencies.
  这种发动机是利用内转子圆外旋轮线和外转子圆内旋轮线相结合的结构,不需曲轴、连杆和配气机构。
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