Workshop Technology
The welding process used to join the ends of two pipes of uniform cross-section, is

Projection welding
Spot welding
Upset butt welding
Seam welding

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Workshop Technology
Lancing is the operation of

Cutting a sheet of metal in a straight line along the length
Cutting a sheet of metal through part of its length and then bending the cut portion
Bending a sheet of metal along a curved axis
Removal of metal to the desired shape from the edge of a plate

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Workshop Technology
Linde welding uses

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

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