... , PROFESSIONAL MANUFACTURERING TECHNOLOGY , AND A STRICT QUALITY CONTROL SYSTEM. 1",2", 3", 4", 5", 6" RUBBER WHEEL Verified Information ... Acceptable Universal Testing Machine WDW-20A 1 3.0 Acceptable Brinell Hardness Tester HB-3000 1 3.0 Acceptable Rockwell Hardness Tester ... HR-150A 1 3.0 Acceptable Production Flow: 1.Plate Cutting ...