Workshop Technology
The upsetting is a process of

Joining the two surfaces of metal under pressure after heating
Reducing the cross-section of a bar
Bending of a bar
Increasing the cross-section of a bar

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Workshop Technology
Notching is the operation of

Cutting a sheet of metal through part of its length and then bending the cut portion
Cutting a sheet of metal in a straight line along the length
Bending a sheet of metal along a curved axis
Removal of metal to the desired shape from the edge of a plate

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