要求高精度的

However, classical manufacture methods cannot meet its special machining requirements because of its complex surface equation.

但由于非球面的复杂结构特性，常规的方法已经不能满足其高精度、高效率的加工要求。

Moreover, aim at the demand for the vision measurement of grids, the grid shape which fits in with the vision measurement is studies, and the methods of hot transfer press and electro-chemical etching are used to produce the accurate grids on sheet metal quickly.

本文还针对视觉测量对网格的要求，研究了适合视觉测量的网格形态，采用了热转印和电化学浸蚀快速制作高精度网格的方法。

Global Positioning System is widely used in geodesy and survey engineering. With the development of GPS, precision becomes more and more important for surveying.

GPS定位技术在测量中的应用日益广泛和深入，随着该技术的不断发展，对GPS测量精度的要求越来越高。

Lobal Positioning System is widely used in geodesy and survey engineering. With the development of GPS, precision becomes more and more important for surveying.

PS定位技术在测量中的应用日益深入广泛，随着该技术的不断发展，对GPS测量精度的要求越来越高。

The main problems and the future developments of the mapping function in atmospheric refraction have described as the conclusion of this paper.

结合当前高精度空间测量的发展要求，还分析了大气折射映射函数研究中的主要问题和今后可能的发展方向。

To meet the common demands of the heterodyne signal process system, a phase measurement system based on dual-differential phase discrimination is studied and applied. With the frequency range of 5kHz-50kHz, this system has sampling rate of 10/sec, stability of ±0.0036°, maximum error of ±0.06°, and it can measure the zero point of phase angle.

围绕高精度外差信号处理系统的一般要求，研究和实现了基于双向差动鉴相的相位测量系统，在5kHz-50kHz的范围内、采样速率10次／秒时，示值稳定性优于±0.0036°，最大误差小于±0.06°，可以测量零相位。

Through the detailed engineering design, calculation, error analysis, a large range and high accuracy measurement of the moment of inertia is realized.

并进行了详细的工程设计、计算和误差分析，实现了转动惯量的大量程、高精度测量，满足了主惯性轴的测量要求。

With the development of the aerospace technology, there is an increasing demand of the reliability and stable state precision.

摘要随着航天技术的发展，对卫星姿态和轨道控制的可靠性和稳态精度的要求越来越高。

The invention relates to the measurement field and solves the problem that no method is available for accurately measuring the included angle between the laser emission shaft and the mechanical reference surface in an optical test system with small beam divergence angle and strict requirement for pointing control accuracy.

本发明涉及测量领域，它解决了在光束发散角小、指向控制精度要求高的光学测试系统中，激光发射轴与机械基准面的夹角需要严格测出，目前并无方法对其进行测量的问题。

While the construction of the high precision measuring device cannot be rigid enough to keep within the demanded limits in the orthogonal direc- tions to the line gauge beam under various loading condi- tions of the device to be measured, length indicators mounted on separate supports to control lateral displace- ments contacting the horizontal and vertical beam faces are added.

而建设 高精度测量装置不能刚性不够为了保持内部要求限制在正交目录筹措到线衡量光束下不同加载条件-筹措的器件测量，长度指标安装于单独的支持，以控制侧向位移-自1912年接触横向和纵向束面补充。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐