| 摘要 |
In a spinning operation in which two strands are fed from separate nip positions and are twisted together into a single ply at a convergence point, twist is incorporated into the single strands by cyclically varying the path lengths of the strands between the nip positions and the convergence point. Preferential spiralling of one strand about the other is prevented by ensuring that the ratio of feed of the strands to the convergence point are substantially equal.
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