CST Documentation 文件夹中有一个低频仿真的例子，我在做这个例子的时候，发现coil建模后是空心的片体，而例子中的coil是实心的固体，检查了一下，是step by step follow 练习中的步骤来的，但是没找到问题所在，我想知道这是哪里的设置除了问题
第一张图片是 Documentation练习中的coil建模结果，第二张图是我自己建模的coil结果，这里的coil是不一样的，我想知道原因，谢谢！
There is a low-frequency simulation example in the CST Documentation folder. When I was working on this example, I found that the coil modeled was a hollow sheet, while the coil in the example was a solid solid. I checked and found that it was from the steps in the step by step follow exercise, but I couldn't find the problem. I want to know where the setting is wrong.
The first picture is the coil modeling result in the Documentation exercise, and the second picture is the coil result I modeled myself. The coils here are different. I want to know the reason. Thank you!
