ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

An accurate judgment method on tooth undercutting of noncircular gear has been proposed. According to the numerical computation model of shaping, the tooth profile in normal isometric family curves of noncircular gear pitch line and conjugate point in shaper were calculated at first. Then, the theory of tooth undercutting in noncircular gear shaping was analysed by using the essential theory of tooth mesh. Finally, through synthesis of numerical computation model of shaping and theory of tooth undercutting, the accurate judgment method on tooth undercutting of noncircular gear has been obtained, and the numerical estimate method of tooth undercutting has been founded. So, the default of tooth undercutting could be found out in design process of noncircular gear.