Forging Parts, Industrial Machinery Parts, Casting & Forging manufacturer / supplier in China, offering 40cr ASTM5140 Alloy Forged Ring for Automotive Gearbox Gears and Bearing Rings, 60si2mn 61sicr7 Anti Fatigue Spring Steel Hexagonal Tube Tempered Special-Shaped Tube, 20crmnti Hexagonal Pipe Transmission Shaft Triangular Shaped Tube for Automotive Gear Shafts and so on.