... 3)Graphite ring is used in parts in non-oil lubricative machine, such as the bearings on case-hardened ... bearings; It can avoid problem of pollution by lubricating oil.Main shaped graphite products: Graphite rod, graphite plate, ... fields, such as machinery, electron, Semi-conductor, Mono-crystalline silicon, metallurgy,oil, chemistry, textile, motor, electrical appliances, electrical furnace, traffic, ...