阐述技术制图实践的基本原则，包括技术制图中使用的术语和缩写；图纸的材料、尺寸和布局；线条的类型和厚度；字母、数字和符号的类型和尺寸；绘制比例尺；投射；切片；尺寸标注和几何公差以及特征和零件的常规表示。附录提供了有关绘制图形和几何公差的信息。

Sets out the basic principles of technical drawing practice, and covers terminology and abbreviations used in technical drawings; materials, sizes and layout of drawing sheets; types and thicknesses of lines; types and dimensions of letters, numerals and symbols; drawing scales; projectioning; sectioning; dimensioning and geometry tolerancing and the conventional representation of features and parts. Appendices provide information on the development of pictorial drawings and geometry tolerancing.