Workshop Technology
Riddle is used for

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

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Workshop Technology
Linde welding uses

Neutral flame and rightward technique
Oxidizing flame and leftward technique
Neutral flame and leftward technique
Carburising flame and rightward technique

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