滚动轴承是一种工业物质资源,它广泛用于各类机械,在国民经济中占有重要地位,但同时又大量地消耗其它物质资源。据估计,目前全世界的轴承年产量已超过50亿套。如以每套轴承平均净重0.3公斤和材料利用 Rolling bearing is an industrial material resources, it is widely used in various types of machinery, occupies an important position in the national economy, but at the same time consume a large amount of other material resources. It is estimated that the current annual production of bearings in the world has more than 5 billion sets. As an average of each bearing 0.3 kg net weight and material utilization