视图是按正投影法即零件向投影面投影得到的图形。
Orthography of the view is based on the projection plane projection parts are the graphics.
掌握并应用正投影法的基本原理，学会运用投影法进行工程形体的观察。
Mastering basic principles of Orthographic Projection; knowing how to observe and analyze engineering objects using project methods;
由于在工程图学中，用正投影法解决画法几何中的某些度量和定位问题往往很不方便。
In engineering drawing, it is always inconvenient for orthographic projection to solve some measurement and orientation problems.
由于在工程图学中，用正投影法解决画法几何中的某些度量和定位问题往往很不方便。
In engineering drawing, it is always inconvenient for orthographic projection to solve some measurement and orientation problems.
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