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华北石油管理局钻井工艺研究所研制的JZ—Y159型液压减震器,采用无活塞式结构,具有密封可靠、工作油液成本低、使用寿命长等特点。6年的使用情况表明,这种减震器使用效果很好。
JZ-Y159 hydraulic shock absorber developed by North China Petroleum Administration Drilling Technology Research Institute adopts a piston-less structure, which has the characteristics of reliable sealing, low working fluid cost and long service life. 6 years of use shows that this shock absorber works well.