Motorcycle sprocket wheel1) Material:45# steel,16 # Mn,A3 steel2) Specification:415,420,428,428H,520..etc3) Front gear:13T,14T,15T,16T,17T..etc4) Rear gear:34T,35T,36T,37T,38T,57T..etc5) Heat treatment:High frenquency quenching,Carburization6) Surface...
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