Workshop Technology
A two high rolling mill consists of two rolls which rotate

At the same speed and in the same direction
At different speeds and in the same direction
At the same speed but in opposite direction
At different speeds and in the opposite direction

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Workshop Technology
Spot welding is used for welding

Butt joints in plates having 0.025 mm to 1.25 mm thickness
Lap joints in plates having thickness above 3 mm
Lap joints in plates having 0.025 mm to 1.25 mm thickness
Butt joints in plates having thickness above 3 mm

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