... professional manufacturer of forged rings for Wind tower,Blade,Gears, Ring Gears, Swing Bearings, Shaft ,Cylinder Shaft, Collared Shaft, Stepped Shaft ... .forging products, which are extensive used petroleum, chemical industry,ship-building,metallurgy,mining,hydraulic pressure, gear case,port,ship driving mechanism and ... . Let's hope for good cooperation between us! ball bearing ring