渐开线

In this paper, we proved that there exists only one contact point between a pair of non-circular gears working under the designed pitch curves when they are manufactured by involute cylindrical gear cutter in numeric control slotting machine. Under this manufacturing condition, the pair of non-circular gears can mesh accurately.

证明了采用渐开线圆柱齿轮刀具在数控插齿机上加工的1对非圆齿轮副传动时，在其按设计的已知节曲线工作时，两非圆齿轮副的齿廓具有单一的接触点，即能保证正确的啮合关系，为深入分析非圆齿轮副的传动机理提供了前提。

TI worm drive is the drive style consisted of involute helical gear and hourglassworm enveloped by the gear.

TI蜗杆传动是由渐开线斜齿轮及其包络的环面蜗杆组成的一种传动方式。

A way to construct a descriptive geometric model of a finger cutter for processing a helical gear is presented.

论述了加工渐开线斜齿圆柱齿轮指形铣刀画法几何模型的建立方法；推导出指形铣刀轴剖面廓形曲线上点的坐标方程；进行通用Autolisp程序设计，并举例绘制轴剖面廓形。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。