UC知道还有手工翻译，急啊，机械方面的
来源：百度知道 编辑：UC知道 时间：2024/06/08 21:14:39
It was thought that for most practical application the general draughting system would be incorporated in a much larger specific applications system. For this reason the draughting system was as simple as possible consistent with reasonable running efficiency, so that it could be incorporated into an applications system with the minimum of effort.
The facilities embodied in the general CAD system are now described. These facilities are aimed at allowing a user to input graphical information into the computer and file it. Initial data entry is made by digitizing rough sketches. The system also permits the user to access the data, manipulate it, process it, output it in hard-copy form, or refile it for permanent storage.
There are many reasons for using CAD, the most potent driving force is competition. In order to win business, companies used CAD to produce better designs more quickly and more cheaply than their competitors. Productivity is much improved by a CAD progr
The facilities embodied in the general CAD system are now described. These facilities are aimed at allowing a user to input graphical information into the computer and file it. Initial data entry is made by digitizing rough sketches. The system also permits the user to access the data, manipulate it, process it, output it in hard-copy form, or refile it for permanent storage.
There are many reasons for using CAD, the most potent driving force is competition. In order to win business, companies used CAD to produce better designs more quickly and more cheaply than their competitors. Productivity is much improved by a CAD progr
通常认为，对于多数实际应用而言，一般制图系统应被纳入一个更大的专门应用系统。为此，制图系统都是尽可能简单，与合理的运行效率一致，以便它能以最低限度的努力纳入一个应用系统。
现在要描述的就是体现在通用CAD系统中的设施。这些设施旨在让用户将图形信息输入计算机并存入文件。初始数据录入就是粗糙的草图进行数字化。该系统还允许用户访问数据，操纵它，处理它，以硬拷贝形式输出它，或重新存入文件以便永久储存。
有很多原因使用CAD，最强大的动力是竞争。为了争取业务，公司使用CAD以更迅速和更便宜的方式产生比他们的竞争对手更好的设计。CAD程序使您可以轻松地绘制多边形，椭圆，多条平行线和多条平行曲线，极大改善了生产力。当绘制对称部件时，复制，旋转和镜像设施也很方便。CAD程序提供了许多影线模式。以各种颜色填充区域则是艺术作品和展示的要求。任何CAD程序都提供了不同风格字体的文字。输入不同图形文件格式，以及扫描材料（照片）到CAD程序的可能性也是一种资产，特别是图像可以被操纵，修饰和制成动画。
CAD系统的另一个好处是能够储存实体，这是图样上经常使用的。经常使用的部件库可以单独购买,也可以由制图者建造出来。为了在图样上重复使用，在数秒内就可检索和定位一个典型的项目，还可以使它面向任何角度，以适应特定情况。