It analyzes the influence of the grinding wheel wear on geometric size and teethcontact of worm gear, kinematics precision of the quasi-plane double enveloped hourglass one.
分析了砂轮磨损对准平面二次包络环面蜗杆传动的蜗杆几何尺寸以及接触和运动精度的影响。
2
It isn't the amount of sugar you eat; it is the amount of time that the sugar has contact with the teeth.
这与你吃了多少糖无关，而是糖和牙齿接触的时间有多少。
3
To maintain healthy teeth and gums it is important that bristles contact both the tooth surface and the gumline.