Structural Materials: Steel, Metal, New Steel, Steel structure designing, analyzing and drawing software.
结构建材：钢铁、各种金属、钢结构新产品；钢结构设计、分析、绘图软件。
2
Beginning with general proportions, planes and structural landmarks, Charles then demonstrates how to apply these principles with a series of life drawing exercises.
查尔斯从一般的比例，平面和结构的地标，然后演示了如何应用这些原则，推出了一系列的写生练习。
3
Aesthetics, mechanics, drawing, structural formula and mathematics.