http://cache.baidu.com/c?word=word%2C%B7%A2%CB%CD%3B%D3%CA%BC%FE&url=http%3A//www%2Ewudidong%2Ecom/diannao/ruanjian/bangong/200512/35349%2Ehtml&b=0&a=29&user=baidu这里有相关的介绍