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Notice: Undefined index: HTTPS in /www/wwwroot/mengmianren.com/wp-content/plugins/dessky-cache/dessky-cache.php on line 43 有关一对渐开线直齿圆柱齿轮的正确啮合条件表述如,哪些是正确的()A两轮的基圆齿距应相等;B两轮的法向齿距应相等C两轮的分度圆模数和压力角分别相等D两轮节圆上的模数和压力角分别相等 – 萌面人博客