Workshop Technology
Tandem drawing of wires and tubes is necessary because

Annealing is needed between stages
Surface finish improves after every drawing stage
It is not possible to reduce at one stage
Accuracy in dimensions is not possible otherwise

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Workshop Technology
Linde welding uses

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

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