... 2,High wear resistance 3,High impact strength 4,low price Intruduction:Hydraulic cylinders guide ring is high-strength ... cylinders, supporting rings, engineering machineries, bushes for the pivot axles for vehicles, thrust plates, guiding sleeves for the pillars ... cylinders, supporting rings, engineering machineries, bushes for the pivot axles for vehicles, thrust plates, guiding sleeves for the pillars ...