... samples on site, microscope observing and micrography. MODEL XJB-200 METALLOGRAPHIC INSPECTING INSTRUMENT Features This instrument has combined with ... Portable electrolytic polisher: Digital display, voltage & current stabilizer, short circuit protection. Input: 220V AC, 50Hz Output: DC,0-30V, 0 ... on site. portable polishing grinding machine MODEL XJB-200 METALLOGRAPHIC INSPECTING INSTRUMENT