类: Furnitur cost dimensions veight 对象继承类的 location 所有属性和操作 br 对象: chair ell cost we dimensions move weight location 对象 chabie color cost dimensions weight location color move ell weig move对象继承类的 所有属性和操作 对象：chair cost dimensions weight location color buy sell weigh move 类：Furniture cost dimensions weight location color buy sell weigh move 对象：chable cost dimensions weight location color buy sell weigh move