等距圆

A method of determination of the base circle and offset distance was presented and a designer can ascertain the principal size parameters of disk cams correctly or take them as the original numerical values for design.

主要分析了偏置式推杆盘形凸轮机构的主要尺度参数与所给定运动参数之间的关系，并提出了基圆半径r0 ，偏距e等的取值原则与方法，从而准确无误地确定凸轮的主要参数，或是把此参数作为设计变量的初值。

Other features include birth weight, growth and growth retardation, mental retardation, small head, round face, low ears, eyes from too broad, muscle tight low-end, on epicanthus, palm, and so on.

其它特点还包括出生时体重轻、生长及发育迟缓、智能不足、小头、圆脸、低位耳、眼距过宽、肌肉紧结性低、上眦赘皮、断掌等。

In respect to the relationship between cam profile and pressure angles, the design method of cam profile with constant pressure angle was discussed and the cam profile was derived by means of the Euler Formula and the FORTRAN program.

在讨论了凸轮轮廓曲线与压力角的关系的基础上，探讨了等压力角凸轮机构轮廓曲线的设计方法，用改进型的欧拉公式经 FORTRAN编程得出相应的轮廓曲线，并着重分析了凸轮机构中基圆半径、偏距和压力角各参数的变化对凸轮轮廓曲线的影响。

METHODS: The endodontic instrument was assumed as a metal conical bar. The normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics. The relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, and metal elastic modulus were analyzed. The criteria for yielding and fracture of the instrument were discussed.

将根管器械刃部假设截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

METHODS: The endodontic instrument was assumed as a metal conical bar, the normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics , the relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, metal elastic modulus were analyzed, the criteria for yielding and fracture of the instrument were discussed .

将根管器械刃部假设为截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

Relying on the several years experience and technology power of CNC four axis, the factory has become the specialized one manufacturing rotary products like cylinder cam, type cam, abnormal cam, rolling cutter, circle cutter, propeller, impeller, screw groove, adjustable screw groove, closed curve groove etc.

凭借多年CNC四轴加工精湛的生产技术力量，专业生产加工回转类产品，如圆柱凸轮、平面凸轮、异形凸轮、滚切刀、圆切刀、螺旋桨、叶轮、螺旋沟槽、变距螺旋沟槽、封闭曲线沟槽等，并可加工箱体类精密的空间定位孔、面等。

This study has developed a LabVIEW-based digital control system, which features the following functions: adjustment of the distorted waveforms, pulse count to the quarter pitch, waveform subdivision by Lissajous circle, back propagation neural network and PID control, and the position feedback control of the stage.

本项研究开发了基于Labview的数字控制系统，该系统具有失真波形的调整、1/4栅距脉冲计数、基于Lissajous圆环的波形细分、后传神经网络和PID控制以及平台的位置反馈控制等特征。

GB/T2624--936 and production in line with ISO5167 - 1 standard expenditure devices, including pressure Kok access standard orifice, the standard nozzle, the flange pressure from the standard orifice, the trail from pressure from the standard orifice, the length of the nozzle And Venturi tube and cultural Venturi nozzle, double orifice, eccentric orifice, missing a round orifice, cone-shaped entrance orifice, the first-orifice, Pitot Venturi tubes, nozzles, such as the speed of sound. OVAL Co., Ltd.

生产符合GB/T2624--936和ISO5167--1的标准节流装置；包括角接取压标准孔板、标准喷嘴、法兰取压标准孔板、径距取压标准孔板、长径喷嘴以及文丘里管和文丘里喷嘴、双重孔板、偏心孔板、圆缺孔板、锥形入口孔板、端头孔板、皮托文丘里管、音速喷嘴等。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。