Workshop Technology
The metal patterns as compared to wooden patterns require less

Shrinkage allowance
Draft allowance
Distortion allowance
Machining allowance

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Workshop Technology
Lancing is the operation of

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

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