Workshop Technology
Swab is used for

Reinforcement of sand in the top part of the moulding box
Cleaning the moulding sand
Moistening the sand around the edge before removing pattern
Smoothing and cleaning out depressions in the mould

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Workshop Technology
The purpose of a gate is to

Act as a reservoir for the molten metal
Feed the molten metal to the casting in order to compensate for the shrinkage
Delivers molten metal into the mould cavity
Delivers molten metal from pouring basin to gate

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Workshop Technology
Lancing is the operation of

Cutting a sheet of metal in a straight line along the length
Removal of metal to the desired shape from the edge of a plate
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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