然后，再将非退化二阶曲线到自身的双射为对合的充要条件推广到退化二阶曲线两相异点列的情形。
Then, the latter necessary and sufficient condition is generalized to the case for the two different point ranges of degenerate second order curve.
采用现代设计理论和方法对注塑机双曲肘五支铰合模机构进行设计研究，建立了符合工程实际应用的双曲肘五支铰合模机构理论模型，并应用复合形法原理。
By using the modern design theroy methods the double toggle clamping system of injection machine is discussed in defail mathematical models for clamp unit design in particular.
利用机构学的方法对注射成型机五孔直排式双曲肘合模机构进行运动和力学特性分析。
An analysis of motional and mechanical characteristics for double toggle clamping unit with straight five points of injection molding machine is made by the structural method.
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