Manufacturing And Production Technology
In ultrasonic machining, the metal is removed by

Using abrasive slurry between the tool and work
Erosion caused by rapidly recurring spark discharges between the tool and work
Maintaining an electrolyte between the work and tool in a very small gap between the two
Direct contact of tool with the work

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Manufacturing And Production Technology
In oblique cutting of metals, the cutting edge of the tool is

Perpendicular to the workpiece
Inclined at an angle less than 90° to the direction of tool travel
Parallel to the direction of tool travel
Perpendicular to the direction of tool travel

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