... resistant.3,The lifetime is more than 4500 hours.4,The hardness is HRC65-72,the working face precision ... excavator R902-R992American CAT hydraulic excavators Japanese Komatsu hydraulic excavators; (4)Various loaders and land levelers, cranes, mixers, mining machines ... mining machinery customers(2)taiwan(3)Europe,America,the UK,Australia(4)Southest Asia,Thailand,India,Turkey,Indonesia and so ...