Manufacturing And Production Technology
In a shaper, the length of stroke is increased by

Decreasing the length of the slot in the slotted lever
Decreasing the centre distance of bull gear and crank pin
Increasing the length of the arm
Increasing the centre distance of bull gear and crank pin

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Manufacturing And Production Technology
Trepanning is an operation of

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
Sizing and finishing a small diameter hole

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