Workshop Technology
Piercing is an operation of cutting

A number of holes evenly spaced in a regular pattern on a sheet of metal
A cylindrical hole in a sheet of metal by the punch and the die
A flat sheet to the desired shape
A hole (other than cylindrical) in a sheet of metal by the punch and the die

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Workshop Technology
In a compound die

Two or more cutting operations are performed at one station of the press in every stroke of the ram
Two or more operations are performed simultaneously at the single stroke of the ram
Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
Only one operation is performed at each stroke of the ram

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