《工程制图》是一门既有理论又有较强实践的技术基础课。自学完一章一节后,就应该掌握本章的主要内容、原理和作图方法。看书时,不能停留在单纯地阅读,应在阅读的同时,动手描绘所有的作图过程和方法。这样不但容易理解而且能帮助记忆。初学时,可以自己动手做些简单的模型,以帮助想象空间关系。下面谈谈自学前几章的要点。 “Engineering Drafting” is a technical basic course with both theory and strong practice. After completing a chapter of self-study, you should master the main contents, principles, and drawing methods of this chapter. When reading a book, you should not stop reading simply. You should begin to describe all the process and methods of drawing while reading. This is not only easy to understand but also helps memorize. When you are a beginner, you can do some simple models yourself to help visualize spatial relationships. Let’s talk about the points of the first few chapters of self-study.