?What is the purpose of a gas lens?
A. ?It filters out most of the harmful UV and some of the IR light.
B. ?It reduces the turbulence in the shielding gas.
C. ?It filters out dust and dirt that might be in the shielding gas due to a dirty shielding gas hose.
D. ?It helps to see the molten weld pool by magnifying it.
Answer: B
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