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In MIG (Metal Inert Gas) welding, what is the primary purpose of the shielding gas that flows from the nozzle of the welding gun?
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50-50
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Audience
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A
To atomize the filler wire for a smoother bead
B
To cool the tip of the welding gun
C
To create the electric arc required for welding
D
To protect the molten weld pool from atmospheric contamination
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