一、 标准公差 二、 基本偏差 三、公差代号 四、优先、常用和一般公差带

基本内容：了解有关配合的基本概念，掌握光滑圆柱结合的配合基准制

基本要求：了解互换性的意义、标准化的概念、机械精度设计的基本原则、主要方法、本课程的研究对象、任务及要求

【温故知新】 1、组合体的组成方式有哪几种?

1. to know the three basic processes of PCM: Sampling Quantizing Encoding Teaching 2. to understand that PCM is the heart of technology in communications in Objectives

目的：掌握零件互换性的基本概念； 了解机械精度设计的原则方法

1、了解有关尺寸链、封闭环、组成环等的基本概念 2、掌握极值法解算尺寸链

1. to know the operation and advances of WDM and optical network Teaching 2. to understand the main idea and organization of the text; Objectives 3.to master some important new words, phrases and their

I. Revision mins com Teacher uses the following exercise to help the students to revise the important expressions or phrases

1. to know Cellular Mobile Telephone System Teaching 2. to understand the construction of cellular mobile telephone system Objectives