Theorem of choosing teeth is one of basic rules of designing screw steel ball moving teeth driver.

抽齿规律是螺旋钢球活齿传动的基本规律之一。

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Theorem of choosing teeth is one of basic rules of designing screw steel ball moving teeth driver.

抽齿规律是螺旋钢球活齿传动的基本规律之一。

youdao