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.
  這種發動機是利用內轉子圓外鏇輪線和外轉子圓內鏇輪線相結郃的結搆,不需曲軸、連杆和配氣機搆。
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