Workshop Technology
Metal patterns are used for

Small castings
Large castings
Complicated castings
Large scale production of castings

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Workshop Technology
Spot welding is used for welding

Butt joints in plates having thickness above 3 mm
Lap joints in plates having thickness above 3 mm
Butt joints in plates having 0.025 mm to 1.25 mm thickness
Lap joints in plates having 0.025 mm to 1.25 mm thickness

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Workshop Technology
During hot working of metals

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

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