说明：  本例vrml代码需要专门的vrml浏览器浏览，本例代码是钟表模型，在建家居建筑等三维场景时可以直接链接此例插入场景
(Vrml code in this case requires specialized vrml browser to browse this case, the code is the watch model under construction, home building three-dimensional scene can link directly to this case, insert scene)