Workshop Technology
The metal is subjected to mechanical working for

Reducing original block into desired shape
Refining grain size
All of these
Controlling the direction of flow lines

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Workshop Technology
Riddle is used for

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

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