Methods of reading 读图的方法 2.Analysis of lines and planes.线面分析法 We partition the composite solid into individual boundary surfaces. We analyze and identify the space shape of the individual surfaces and their relative locations following the principles of projection.We can further determine intersection curves/lines and their relative locations and finally imagine the overall space shape of the composite solid 把组合体分成若干个面，根据其投影特点确定其空间形状和相对位置， 并判别交线的空间形状和相对位置，从而想象出组合体的形状。 Example 4.Complete the left view by adding the missing detail. 补画组合体左视图 Example 5.Draw the left view of the subtraction composite solid. 画切割式组合体左视图 Example 6.Draw the left view of the hybrid construction solid 画综合式组合体左视图7 Example 6. Draw the left view of the hybrid construction solid. 画综合式组合体左视图 Methods of reading 读图的方法 We partition the composite solid into individual boundary surfaces. We analyze and identify the space shape of the individual surfaces and their relative locations following the principles of projection. We can further determine intersection curves/lines and their relative locations and finally imagine the overall space shape of the composite solid. 把组合体分成若干个面，根据其投影特点确定其空间形状和相对位置, 并判别交线的空间形状和相对位置,从而想象出组合体的形状。 Example 4. Complete the left view by adding the missing detail. 补画组合体左视图 Example 5. Draw the left view of the subtraction composite solid. 画切割式组合体左视图 2. Analysis of lines and planes. 线面分析法