必要性

During example analysis process, theoretical assembly model of microminiaturized circular shaft and sleeve is established, and stress-strain relationship with different parameters is deduced by virtual displacement principle; two finite element assembly models of D shaped shaft and gear, circular shaft and sleeve are established.

在实例分析过程中，建立了微小型圆轴和套装配的理论模型，通过虚位移原理得出装配过程中不同参数值下的应力应变关系；建立了圆轴与套装配、D型轴与齿轮装配的有限元模型，验证了数字化微装配中虚拟检测技术的正确性、必要性和重要性。

On the basis of a few facters which affact the house s vives , it is possible and necessary to analyze and prove how to longer the house s vives , and to propose some of the useful aspects which is about longering them.

在分析影响房屋使用寿命诸因素基础上，论证延长房屋使用寿命的可能性和必要性，提出延长房屋使用寿命的可行途

Vn she refuses to acknowledge the need for reform.

她拒不承认改革的必要性。

The second part of the thesis will make a detailed analysis for the necessity of carrying out the system of education voucher in the period of the basic education of our country.

文章第二部分详细分析我国在基础教育阶段进一步实施"教育券"制度的必要性。

In the third part, warrants is necessary.

在文章的第三部分，分析我国实施认股权证制度的必要性。

The Trial Production Performance Forecast Research of Daniudi Low Permeability Gas Field in Tabamiao;2. An Analysis of Performance and Efficiency of Polymer Flood at Ng4 Cell of Central Region 1 of Gudao;3. Simulation studies of waterflood performance with horizontal wells.

介绍了组合夹具的用途、结构，以图文并茂的形式叙述了基于Pro/ENGINEER平台上的组合夹具元件库的建立、动态模拟装配、装配体的分析、指导组装工人的工程图和相关信息的生成，简述了建立虚拟组合夹具站的必要性和实用性。

This paper analyzes the significance and necessity of urban waterfront area development,and puts forward the principle for its design and development.

分析了城市滨水地区开发的意义和必要性，提出了城市中心区滨河地区设计与开发应遵循的原则。

Firstly, this article introduces the basic conception about project, project management and building costs and analyses the feature of water conservancy and waterpower construction building projects cost and the situation ...

首先，本文简要介绍了项目成本管理的基本概念，分析了水利水电施工项目的成本特征和施工企业成本管理的现状，阐述了成本管理变革的必要性和急待解决的问题。

Through the Waterscape the arts and cultural connotation of the description set out in the landscape design of the importance and necessity.

通过对水景艺术的文化内涵的描述，阐明其在景观设计中的重要性和必要性。

At last, it sums up the essence and necessity of integration between highway and waterway transport.

最后，提出长三角公路水路一体化发展的内涵和必要性； 3。

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。