良好的机械基本知识，熟悉机械制图和进程。

Good mechanical basic knowledge, familiar with the mechanical drawing and process.

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在第二章中，介绍了一些机械制图的基本知识及制图规则，并介绍了二维图形特征的概念。

In Chapter 2, some basic knowledge and rulers on mechanical drawing are reviewed, and the computer of two dimensional view features is introduced.

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熟悉机械制图，机械制造原理及机械装配的基本知识；

Familiar with the mechanical drawings, mechanical manufacturing principle and basic knowledge of mechanical assembly;

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