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１．改善球笼式万向节润滑条件的方法由于球笼式万向节属一次性润滑，故不能满足挖掘机在恶劣环境下（如涉水作业、泥泞道路作业）工作的需要，常因润滑不良造成万向节钢球、球笼、球头和球座的严重磨损，以致报废。为了改善万向节的润滑条件，可在万向节的外罩上加工出一注入
1. Method of improving the lubrication conditions of the ball cage universal joint Since the ball cage universal joint is a one-time lubrication, it can not meet the needs of the excavator to work in harsh environments (such as wading work, muddy road work), often due to poor lubrication It caused serious wear and tear on the ball, cage, ball head and ball seat of the universal joints. In order to improve the lubrication conditions of the universal joint, an injection can be made on the joint of the universal joint.