Thin lines are used to draw the outlines of superposition cuts. When it overlaps the outlines of the view, the outlines must be drawn completely.
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美
- 其轮廓线用细实线绘制,当视图中的轮廓线与重合断面轮廓线重叠时,视图中的轮廓线仍然应连续画出不可间断。