Workshop Technology
The current in electric resistance welding can be regulated by

Any one of the listed here
Varying the input supply
Changing the primary turns of the transformer
Changing the secondary turns of the transformer

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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 in a straight line along the length
Bending a sheet of metal along a curved axis
Cutting a sheet of metal through part of its length and then bending the cut portion

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