stepped gear
... stepped drum 阶式鼓轮 stepped gear 阶式齿轮 stepped grate 阶梯炉篦 ...
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张光辉教授认为：分阶式双渐开线齿轮具有良好的工艺性能、弯曲强度和接触强度高、最少齿数小等优点。
Prof. Zhang holds that double involute gear with ladder-shaped teeth possesses the advantages of good technology, high bending strength, high contact strength and fewer teeth.
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