Microhardness Tester, Methllograph, Digital Ohm meter, OVVIS recording Spector photo Meter, Shimadzv Cetrifugal Particale size A Shanghai Metal Corp is the ... of AgsnO2.Testing Instruments:Microhardness Tester, Methllograph, Digital Ohm meter, OVVIS recording Spector photo Meter, Shimadzv Cetrifugal Particale size Analyzer, Tensile Tester, Flexivity Teser.Precious Clad ...