机械图表达方法的逻辑关系

Logical Relationship of Expressing Ways of Machanical Drawings

通过对国家标准———机械制图图样画法中各种表达方法的形成、发展、使用条件及相互关系的分析研究，发现它们之间存在着一定的逻辑关系，文中用逻辑框图展现了这些内在关系规律。

After the analysis of the formation,development,application conditions and their relationship of all kinds of mechanical drawing methods under China National Standard,we find that there is a certain logical relationship between them,which is shown in the form of logical charts.