index contour

This paper discusses the index curve as contour in the application of pressure regulating valves, introduces the details of the design method, and analyzes characteristics of pressure regulation under different Mach number.

本文论述了半截式指数型面曲线在环状缝隙式调压阀上的应用，介绍了详细的设计计算方法，分析了在不同马赫数下的调压特性。

A method of the three-coordinate machine to the measurement of direct error happened to the cylindrical indexing cam contour surface is proposed in the paper. It analyzes effect of the cam contour error to index error.

介绍了用三坐标机测量圆柱分度凸轮廓面法向误差的方法，在此基础上分析了廓面误差对圆柱分度凸轮机构分度误差的影响。

The local streaming conditions with embedded parts are analyzed according to the drag index varying theory when the contour section area varies suddenly.

利用流体力学中型腔面积突变时阻力系数变化理论，分析了嵌件塑料件成形时嵌件部位料流流动状况；