... 1.Owned by Chinese Academy of Science 2.Big digital screen and with built-in printer 3.Automatically load ... castings, malleable pieces, hard alloy steel, hardened thin steel sheet, aluminum alloy, copper and bearing steel. Digital screen: Specifications Models HR-150DT Rockwell ... Rockwell Indenter one piece, 1 Diameter 1.5875mm Hard Alloy Steel Ball Indenter 5 pieces, Large Testing Table , Medium ...