Workshop Technology
The metal is subjected to mechanical working for

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

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Workshop Technology
Riddle is used for

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

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