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我单位３台沈阳重型机器厂生产的ＰＹＤ１２００圆锥破碎 机，使用中经常发生不明原因的烧坏衬套事故。最近，有１台设备在１周时间内连续５次烧衬套，给企业造成很大经济损失。为了找出事故的真正原因并制定解决措施，作者和数位同事在一次事故后前往现场，了解到以下情况：（
My unit 3 Shenyang Heavy Machinery Factory PYD1200 cone crusher, the use of the unexplained burn bum accident often occur. Recently, one piece of equipment burned five consecutive times in a week, causing great economic losses to the enterprise. In order to find out the true cause of the accident and work out the solution, the author and several colleagues came to the scene after an accident and learned the following: