Workshop Technology
During hot working of metals

All of the listed here
Mechanical properties are improved due to refinement of grains
Grain structure of the metal is refined
Porosity of the metal is largely eliminated

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Workshop Technology
Swab is used for

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

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