| 摘要 |
Process for continuous preparation of a long weld seam metal tube in which a metal band from a metal band store is formed in a profiling device similar to a slit tube, the slit tube is arc welded at the edges under a shielding gas, the welding set having two welding electrodes, the tips of which are directed to the same weld point. To change an electrode an auxiliary arc is ignited in a replacement unit and welding is continued with this unit.
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