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介绍了东风4型机车16V240ZJ型柴油机活塞环糟的磨损状况，采用等离子喷涂技术对其磨损部位进行修复的必要性、可行性及实施方法，并对其经济性进行了评价。
This paper introduces the wear status of piston ring of 16V240ZJ diesel engine of Dongfeng 4 locomotive, the necessity, feasibility and implementation method of using plasma spraying technology to repair its worn parts, and evaluates its economy.