http://www.safety.com.cn/anlifx/fileview.asp?title=%B2%C9%BF%D5%C7%F8%CD%DF%CB%B9%B3%E9%B7%C5%BC%BC%CA%F5%D3%C5%D1%A1%BC%B0%CA%CA%D3%C3%D0%D4%B7%D6%CE%F6&filename=ns108230.txthttp://www.szmtgy.gov.cn/typenews.asp?id=311这两个网页比我说的清楚,你看看对你应该有帮助的,呵呵