In the early 20th century, the demand for military equipment during the first and second world wars was so great that the corresponding cheap and reliable metal bonding process was valued, which in turn promoted the development of welding technology.After the war, several modern welding technologies emerged, including the most popular manual arc welding and automatic or semi-automatic welding technologies such as fgsaw, submerged arc welding (submerged arc welding), flux cored wire arc welding and electroslag welding.
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