精密的

From two to five chapter, there are mainly four research contents, which are the ultra-precision machining mechanism of engineering ceramic in the aspects of micro-scale and macro-scale, the key technology equipment, the ductile regime grinding experiments and surface quality of ultra-precision grinding. At last, there is a summary of the whole thesis.

第二章至第五章是本论文研究的主要内容，即工程陶瓷超精密磨削机理、超精密加工的关键工艺装备、超精密磨削的表面质量和延性域磨削实验研究四大部分，最后一章是全文总结。

It is urgent to solve how to produce it efficiently and economically.In this paper, with the guidance of precision forming complex components, basing on the forming theory of obturated-extrusion, combining the technique of hot extrusion, considering the characteristics of steering knuckle, so the one-step precision obturated lateral-bend extrusion forming method and the two-step forming method are presented.

本文以复杂零件的精密成形为指导思想，根据闭塞挤压成形理论，结合热挤压技术，针对轿车转向节零件的自身特点，提出轿车转向节零件的闭塞侧弯挤压精密一步成形法和闭塞侧弯挤压精密预制坯与开式终锻相结合的两步成形法两种工艺。

The spindle selects enclosed rolling bearing for supporting; vertical and horizontal drag board are adopted with enclosed rolling rod drive; body guide ways are casted with abrasion-resistance iron quenched with super frequency and milled precisely, and all these contribute to a long-term processing precision and a long lifespan; 5.5KW motor serves as the main motor contribute to a stronger turning capacity and larger rotary speed range; Workpiece clamping is are adopted withed with spring collet, it can also be equipped with hydraulic chuck, four-spindle oil cylinder, pneumatic, hydraulic tail stock.

CK6232数控车床是一款高刚性封密数控车床，特别适宜粗精加工，整机造型稳重大方，全封闭护罩防护，主轴采用精密刚性轴承支撑，纵横向拖板采用精密滚珠丝杆传动，床身导轨采用耐磨铸铁铸造，经超音频淬火及精密磨削，能长期稳定的保证加工精度和使用寿命；主电机选用5.5KW 的电机，使主轴有更强的切削能力和转速范围；工件装夹方式选用弹簧夹头，也可按用户要求配置手动卡盘、液压卡盘，气压、液压尾座。

The precise satellites clock error estimation algorithm of navigation satellites is studied in this paper. The computation of precise satellites clock error based on the non-difference phase is realized and the results are compared with the products provided by IGS analysis centers.

研究了导航卫星精密钟差的估计算法，编程实现了基于非差载波相位的精密卫星钟差的解算，并同IGS若干分析中心提供的精密钟差产品进行了比较。

Powder metallurgy products / PIM metal powder injection molding / precision casting / structural parts: Stainless steel powder metallurgy structural parts, powder metallurgy iron-based, powder metallurgy copper, stainless steel casting, metal powder injection molding MIM structural components, precision steel casting; cam , metal buttons, spherical oil bearings, bushings, bushing; copier parts, printer parts, automotive, electronics, office equipment, medical equipment, environmental protection and filtration equipment and other machinery, electrical appliances, electric / pneumatic products in the precision parts; products used within the industry shaped metal structure parts, non-standard parts, hardware accessories.

粉末冶金制品/PIM金属粉末注射成型/精密铸件/结构零件：不锈钢粉末冶金结构件、粉末冶金铁基、粉末冶金铜基、不锈钢压铸件、金属粉末射出成形MIM结构零件、精密铸钢件；凸轮、金属按键、球形含油轴承、轴套、衬套；复印机配件、打印机零件、汽车、电机、办公器械、医疗器械、环保过滤设备及其他各种机械、电器、电/气动产品内的精密零件；各行业产品内部用的异形金属结构零部件、非标准件、五金配件。

To the fastest efficiency and excellent quality of customer manufacturing precision plastic mold, connectors, connectors, precision die stamping die accessories and electronic semiconductor die finished with a special shoot, shoot precision yen inserts , Punch, guided-chu, I. Case, Secretary extinguishers, filling up, flat roof, import spring, the opening and closing, square Dingzhen, special machinery, spare parts production, molding inserts, bushings, dozens of special-top precision Mould parts, various brands and sales agency abrasive, knives, date of chapter.

以最快的效率和优良的品质为客户专业制造精密塑胶模具、连接器、接插件、冲压模具高精度模具配件及电子半导体类模具用之特殊成品梢、精密圆梢镶件、冲头、导柱、导套、司筒、灌嘴、扁顶、进口弹簧、开闭器、方型顶针、特殊机械、零件制作、成型镶件、衬套、特殊冲头等数十种精密模具配件、并代销各种品牌磨料、刀具、日期章。

The ultraprecision plane is the base of precision machine tool and precision instrument. Plane precision is measured accurately is very important.

超精密平面是精密机床和精密仪器的精度基础，有效准确地测量平面精度是极为重要的。

In this study, six campaigns around Anping tide gauge, Tainan, were successfully performed and the collected GPS buoy data were processed with four types of precise ephemeris provided by IGS, including final product, rapid product, ultra-rapid product and ultra-rapid product with the use of PPP technique. Comparing the PPP results with DGPS, the differences reach 3~5 cm in the horizontal and 10 cm in the vertical with final product; 6~8 cm in the horizontal and 15 cm in the vertical with rapid product; 15~20 cm in the horizontal and 30~40 cm in the vertical with ultra-rapid product; 2~3 m in the horizontal and 3~4 m in the vertical with ultra-rapid product. In addition, the collected data were also processed by DGPS techniques using different reference stations to analyze the effect of various baselines. The results show that accuracy degrades when the baselines increase.

本研究在台南安平潮位站旁进行6次GPS浮标施测，首先利用与GPS浮标距离不同之GPS参考主站来进行差分定位，分析基线距离对GPS浮标定位成果的影响，由实验结果可得出基线越长则定位准确度越低；再以IGS提供之最终产品、快速产品、超快速产品(Ultra-Rapid product)之观测部分observed half、超快速产品(Ultra-Rapid product)之预估部分四种不同发布延迟时间的精密星历与精密时表改正资料对GPS浮标进行精密单点定位解算，与传统差分相对定位方法定位结果进行比较后，得出使用最终产品之平面方向均方根误差(Root Mean Square Error， RMSE)可达3~5公分，而高程方向均方根误差可达10公分；快速产品之平面方向均方根误差可达6~8公分，而高程方向均方根误差可达15公分；超快速产品观测部分之平面方向均方根误差可达15~20公分，而高程方向均方根误差可达30~40公分；超快速产品预估部分之平面方向均方根误差可达2~3公尺，而高程方向均方根误差可达3~4公尺。

The company has Asia's first large-scale YKM51250 precision CNC shaping machine design development and debugging of key personnel and technology, the company has Guoneishoutai column feed into large-scale precision CNC machine - YKM51130 the design and manufacture of performance, the company has And Wazhou Group, the coal-Zhangjiakou, north of Qiqihar machines, Jiangsu Qidong VIA Machinery Co., Ltd., CITIC重型机械厂Luoyang in Henan and other large state-owned enterprise groups, as they painstakingly created a big three-axis precision CNC slotting machine products .

公司拥有亚洲第一台YKM51250大型数控精密插齿机设计开发及调试的主要人员及技术，公司拥有国内首台立柱进给大型数控精密插齿机—YKM51130的设计制造业绩，公司已先后与瓦轴集团、张家口煤机、齐齐哈尔北方机器、江苏启东威盛机械有限公司、河南洛阳中信重型机械厂等国有大型企业集团合作，为他们精心制造了大三轴数控精密插齿机产品。

Most of the developing X-Y tables applied Ball screw-driven table system or piezo-ceramic linear motor by taking the advantages of carrying heavy loads. However, their cost are very high in contrast to the proposed architecture. In some particular application fields. Carrying heavy loads is not the main requirement for the X-Y table, such as organic cell inspection, optical fiber alignment, nano-material research, ect. Taking this idea as a premise, if we could able to create a precise positioning X-Y table with very low cost, we will be able to achieve the extremely high commercial value and highly competitive ability.

X-Y精密定位平台的开发，不外乎线性马达或压电陶瓷马达搭配导螺杆或其它机构所组成，其优点是可以承载较重之待测物体，缺点是重量大且价格昂贵，在许多应用上并不要求测试平台拥有太大的荷重能力，如生物医学诊断及检测，生物晶片开发及检测，光纤校准，奈米材料研发，奈米量测及精密全平面扫描等等，如果以此为前提，能以极低之成本创造出高精密定位之X-Y平台，将会有极高之商业价值及极大之竞争力。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。