Workshop Technology
Linde welding uses

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

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Workshop Technology
Swab is used for

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

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