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device for the electric welding of metallstuecken, in which the two surfaces in a flow verschweissenden we operate together, and the formation of an arc back separately, then to obtain the schweissdruckes again gegeneinande to be rgedrueckt
device for the electric welding of metallstuecken, in which the two surfaces in a flow verschweissenden we operate together, and the formation of an arc back separately, then to obtain the schweissdruckes again gegeneinande to be rgedrueckt