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In ultra-sonic machining, the metal is removed by. | |
A. | using abrasive slurry between the tool and work [Correct Answer] |
B. | direct contact of tool with the work [Wrong Answer] |
C. | maintaining an electrolyte between the work and tool in a very small gap between the two [Wrong Answer] |
D. | erosion caused by rapidly recurring spark discharges between the tool and work [Wrong Answer] |