关于基本视图表达立体的一些思考

The Exploration on the Idea that Principle Views Express Solid

工程图学教材在介绍立体形状的表达时重点强调了正确、完整、清晰的要求，对唯一确定性要求不够明确。通过6个基本视图相同却对应两个不同立体的实例，指出用基本视图表达立体存在唯一确定性不充分的问题，探讨了在工程图学理论体系内，可以通过轴测图、假想轮廓线、斜视图和斜剖视图等方式进行补充表达，以唯一确定立体的结构和形状。

In the introduction to express solid shape in engineering graphics textbook, empha- sized the correctness and completeness are emphasized,but it doesn＇t have the required u- niqueness. Through six different examples, the principle views illustrated that expression ex- ists insufficient uniqueness problems, explored that the uniqueness of the structure and shape can be achieved by axonometric projection, imaginary outline, oblique view or sectional view with inclined cutting plane to supplement expression,whthin the theoretical system of engi- neering graphics.