题目内容

一对能正确啮合传动的渐开线直齿圆柱齿轮,其啮合角一定为 20 度。( )

A. 对
B. 错

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渐开线直齿圆柱齿轮同一基圆的两同向渐开线为等距线。( )

A. 对
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对于单个齿轮来说,节圆半径就等于分度圆半径。( )

A. 对
B. 错

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A. influence
B. responsibility
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