1. In the light of the inefficiency of the conventional 2 - D engagement design method for tricone bits and the untruth of the 2 - D engagement chart, a new Program for bit engagement design is develope. 针对三牙轮钻头传统的二维啮合设计方法的低效率和二维啮合图的不真实性，开发出一个三牙轮钻头啮合设计新程序。
2. Since the gear engagement is a common coupling form between rotors, the transfer matrix of skew gear engagement in global coordinate system is deduced based on the concept of coupling element. 齿轮啮合是转子之间常见的一种耦合形式，根据耦合单元的概念，推导了在全局坐标系下斜齿轮啮合的传递矩阵。
3. On the basis of the engagement principle of spatial curved surface, the engagement features of the toroidal drive are systematically studied. 采用空间啮合理论对超环面行星蜗杆传动的啮合特性进行了系统的研究。
4. Since the gear engagement is a common coupling form between rotors, the transfer matrix of skew gear engagement in global coordinate system is deduced based on the concept of coupling element. 齿轮啮合是转子之间常见的一种耦合形式，根据耦合单元的概念，推导了在全局坐标系下斜齿轮啮合的传递矩阵。
5. product:pp film non-woven bags, non-woven bags, pp film non-woven fabrics, non-woven fabric, apron, product all kinds of non-woven bags. 专业生产：复膜无纺布袋，无纺布袋，复膜无纺布，无纺布，围群，各种各样的无妨布袋。
