正三棱锥

三维声线追踪的正三棱锥前向伸展算法

A three-dimensional sound ray tracing method by deploying regular tetrahedrons

犯罪构成要件关系是一种正三棱锥关系，犯罪主体、犯罪客观方面、犯罪对象处于正三棱锥底面的三个顶点，而犯罪的主观方面正式这个立体图形的顶点。

Criminal subject , objective aspect of crime , crime being the object at the bottom of the three vertices Pyramid . The subjective aspects of the crime is the official culmination of this three-dimensional graphics .

位于动平台与基座上的3个球铰中心分别与中间球铰中心构成正三棱锥结构，机构成为由中间球铰连接的对顶双锥机构。

The centres of 3 global hinges and the centre of middle global hinge situated in the moving platform and the pedestal separately just formed the pyramid structure , and the mechanism becomes an opposing vertexes double pyramid mechanism linked by the middle global hinge .