Manufacturing And Production Technology
Trepanning is an operation of

Sizing and finishing a small diameter hole
Smoothing and squaring the surface around a hole
Making a cone-shaped enlargement of the end of a hole
Producing a hole by removing metal along the circumference of a hollow cutting tool

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Manufacturing And Production Technology
The saw milling is an operation of

Producing narrow slots or grooves on a workpiece
Machining several surfaces of a workpiece simultaneously
Producing grooves around the periphery of a cylindrical or conical workpiece
Reproduction of an outline of a template on a workpiece

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