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Which of the following is/are the cleaning methods after the exposure of specimen?

Which of the following is/are the cleaning methods after the exposure of specimen? Correct Answer Sandblasting, rubber-stopper and use of chemical and solvents

Cleaning methods after the exposure of specimeMechanical methods such as scraping, brushing, sandblasting and the rubber stopper Chemical methods in which chemical solutions and solvents are used for removal Electrolytic methods in which specimen is made cathode under an impressed current.

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