2. As shown in the figure, draw a semicircle in the top view, then rotate the semicircle to the left view, and rotate the semicircle to the center as the base point of the angle (for example, 10 degree).
3. Return to the overlooking picture; Make a circle at the same point of the center of the circle, and then trim the semicircle that coincides with the semicircle. In this way, you can see the isometric view in the image of two semicircles, and put the two semicircles together with the move command;
4. Move the view to the left view, create a small circle of the graph at the endpoint, a small circle at the right view, and two small circles at each endpoint, depending on the endpoint directions of the two semicircles in T.. He ignored the chart.
5. Scan two small circles respectively, and the scanning path is along two semicircles.
6. At this point, one unit of the spring has been completed. When copying commands are executed, all commands will be selected, with one endpoint as the base point, another endpoint as the base point, and another endpoint as the other endpoint, so as to realize spring growth, and so on, and the number of copies will be determined as needed.