Topic outline
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Wire reel
Filler materials
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Welding-3G Position
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Welding in a 3G position means moving the torch vertically, up and down across a surface. This is in contrast with 1G (flat surface welding), 2G (horizontal welding), and 4G (overhead ceiling welding).
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Welding-4G Position
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With this key in mind, what 4G mainly covers is Overhead Groove Welding. Meaning, the ability of welding metals to be joined together in an overhead position. Since this is the fourth, that most likely means that it is the hardest to do from the rest of the welding positions.
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