... 2,5SUMITOMO S280FJ BulldozerTY320,D155,D85,T140-1 KobelcoSK07,SK200mechanical part: Our mechanical part which is widely applied in track mounted engineering plant ... engineering plant. The hardness is HRC58-62 , the working face precision within 0.015um , flatness up to0.1um-0.2um ,the ... Various loaders and land levelers, cranes, mixers, mining machines, etc. Mechanical Part For Excavator And Bulldozer