| 摘要 |
This invention provides a method for on-site production of a protective gas mixture for arc joining, in particular for arc welding. Gaseous argon is removed from a liquid argon supply and helium is added to the argon, and a doping gas premix which is prepared separately on-site is added. Various combinations of argon, helium and the doping gas premix are supplied via a protective gas supply device which supplies multiple workplaces with different gas mixtures without the need for specialty gas mixing equipment.
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