| 摘要 |
The invention relates to the welding of a pin 6 to a metal workpiece 7. The time-delay unit 14, 15 makes it possible to preheat, with a low-power electric arc, between the pin 6 and the workpiece 7, after which the actual welding is carried out at full power. Applications: welding of high-strength steel workpieces without preheating using the torch and without interposition of an intermediate part. <IMAGE>
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