| 摘要 |
A shielding gas for gas shielded metal-arc welding or brazing with multiple (in particular 2) wire electrodes, one common melting bath, and multiple power sources. Such shielding gases contain, for example, a small percentage of carbon dioxide or doping gas and possibly hydrogen, 10%-75% helium, with the remainder argon. The process is applicable to aluminum materials and low alloy or high alloy steels, for example.
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