概况

The first part gives an overview of the electronics postal service in China, which is a new strategy adopted by the China Post and plays a more and more important role in postal enterprises in China.

第一部分主要介绍了电子邮政的概况，电子邮政是中国邮政的发展新战略，在邮政企业中处于越来越重要的地位。

Firstly, This paper introduces the development of computer control theory and the testing process of high-duty fuel cooled oil cooler.

本文首先叙述了计算机测控系统的发展概况以及燃／滑油散热器的试验过程，在充分分析设计指标和要求的前提下，提出了试验台总体方案的设计。

On the basis of the introduction of the survey of geothermal water resource and its current situation of the exploitation and utilization, the article describes the environmental geological problem and the environmental issues in a brief. Especially, the land subsidence, the thermal pollution and the decay of the geothermal water resources etc, and analyzes the generated mechanisms of these environmental geological problems.

在介绍了地热水资源概况及开发利用现状基础上，对地热水资源开发及利用所带来的环境及环境地质问题进行了简单的介绍，特别是地面沉降、热污染及地热水资源衰减等，并分析了这些环境地质问题产生的机理。

Project Description:The non-saturated polyester resin is one kind of main thermosetting resins.

项目概况：不饱和聚酯树脂是热固性树脂的主要品种之一。

One general situation is the main thoroughfare of Russia and European commerce on Baltic history.

一概况波罗的海历史上就是俄罗斯与欧洲贸易的重要通道。

I decided to try to put into one document an overview of how throttling works, along with some sample projects to help get your head around it.

我决定尝试把一个文件是如何节流工程概况，以及一些示例项目，以帮助让你周围的头。

This paper firstly introduces the deep excavation's engineering situation,geological and hydro-geological conditions of Wuhan University's Science and Technology Incubator Building,and mainly introduces design train of thoughts of choosing different timbering precepts according to field's circumjacent condition.

首先介绍了武汉大学科技孵化器大楼深基坑工程的工程概况及工程地质水文地质条件，重点介绍了根据场地周边条件的不同选择不同支护方案的设计思路。

From semiconductor and passive component, integrated circuit design, electron is assembled with make equipment, material without lead, to the test attestation serves multivariate focusing, from stick a yuan of parts of an apparatus, down to tinily the PCB board, equipment that nod glue, surface sticks furnish equipment, solder the equipment new product that involves an electron to assemble process of science and technology, in can handing in meeting electron high to exhibit rich item on display, find.

从半导体与被动元件、集成电路设计、电子组装与无铅制造行动措施、材料，到测试认证办事多元聚焦，从细小的贴片元器件、以至PCB板、点胶行动措施、概况贴装行动措施、焊接行动措施等波及电子组装科技过程的新产物，都能够在高交会电子展丰硕的展品中找到。

To Observe the Effect of Huangfengshi Serial Therapy:Fire-needle Close in Therapy for Treating Tophus;2. The fire-needle s general situation and local histopathologic change of chronic sports traumatology have been reviewed.

回顾了火针的概况、慢性运动损伤局部的组织病理学变化，从现代医学和传统医学角度初步分析了火针、激光火针治疗慢性运动损伤的机制，总结了火针和激光火针在治疗慢性运动损伤方面的应用。

The paper reviews the phylogeny of the LCD, describes the recent development situation of LCD-TV and several authority investigation institution do its prospective forcast. The research of the switching power supply, future development t rend is given in the paper. Outlines of LCD-TV technology, introduce the sort of topological structure. The BUCK type converter topological structure and the systematical basictheory were put emphasis on; the PFC, the reasons of power factor simply and the core of L6562 were analyzed, emphatically on the application circuit of this core, and account the design parameter of the application circuit. The sort and control mode of PWM, the control core of UC3846 and OB2262 were explained, the application circuit of this core were specific analyzed, practice picture in the real circuit uses oscilloscope were educed and contrastive analysis in this research.

本文回顾了LCD的发展史，介绍了LCD-TV发展的近况和一些权威调查机构对其未来的预测；对开关电源的研究概况和它的发展趋势作了总结；总体介绍了LCD-TV电源的结构及工作原理、拓扑结构的分类，着重研究了BUCK型变换器的拓扑结构及工作原理；对PFC作了综述，研究了功率因数降低的原因，重点介绍了L6562芯片，对此芯片的应用电路作了具体分析，并对芯片外围的设计参数作了分析研究；研究了PWM的分类和控制模式，对控制芯片UC3846和OB2262分别进行了重点说明，详细研究了基于UC3846的PWM设计，用示波器对其实际电路进行了抓图，并对比分析实际波形。

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。