Black polymer armored MIG swan necks contain a thick copper wall with a conductor tube interior, so they don’t radiate or reflect heat as quickly. Optimizing MIG welding gun performance in specific applications can be a matter of choosing different components for the gun. Selecting the right MIG gun neck improves access to the weld joint, increases operator comfort and can reduce costs in the operation. ;http://www.shengruipu.com/
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