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Why must the polished surface of a specimen be etched? No etching is necessary to study the microstructure of a polished metal specimen Because it
Why must the polished surface of a specimen be etched?\ No etching is necessary to study the microstructure of a polished metal specimen\ Because it is needed to change the color of the specimen\ Because a mirror-like surface will show no structure while the chemical solution is used to react with the various ingredients of the metal and cause certain regions to become slightly recessed and irregular in depth\ Because a mirror-like surface is needed to study the microstructure of metals
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