... service life roller 2.low cost and price roller 3.short maintenance cycle roller introductionRoller is used in roller press.Roller press is ... sandstone,shale and so on),quartz sand ,iron ore etc .Roller press, also known as extrusion mill, rolling mill, is ... features and performance1.The hard surface welding technology can service a roller welding service life more than 8000~12000 hours2.The bimetal ...