Product Description JBW-300B Computer Control Automnatic Metal Charpy Impact Testing Machine 300 j School Lab Equipment Brief Introduction JBW-300 computer control impact testing machine is ideal testing equipment , est usus ut metiretur metallum resistere impulsum onerat materiae proprietatibus in dynamic. Potest occursum GB / T229-2007 <<Charpy metallum retusis test modum impulsum>>, 145-2007 JJG<<Penduli impulsum tentationis machina …