Outside of Gothenburg, Sweden is the Repslagarmuseet ("Museum of Rope Making"). The museum is in fact a functional factory where they manufacture rope in the old-school manner, in this case rigging lines for the Galeas Gurine, a restored sailing ship in Norway.
The full video (>4 mins, below) is worth the watch. And check out how around the 0:52 mark, rope maker Sarah spots a fraying line about to be fed through the machine, stops the production line, and expertly splices it back together before restarting:
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I'll never complain about threading a serger again.