哈哈哈，同学们，不是4个轮子，是6个。轮子上有刹车哈，不会乱动的，很稳定！！

来源: 汉代蜜瓜于 2016-10-17 18:07:24 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.