下推式磁悬浮

总共经历了四代变迁  = =！以下四张图！！！

然后终于完成

https://v.youku.com/v_show/id_XNDExNjkzNjQ5Mg==.html?spm=a2h3j.8428770.3416059.1

https://v.youku.com/v_show/id_XNDExNjkzNDEyMA==.html?spm=a2h3j.8428770.3416059.1