Workshop Technology
The metal is subjected to mechanical working for

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

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Workshop Technology
Riddle is used for

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

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