['The', 'tumbler-needle', 'plays', 'a', 'crucial', 'role', 'in', 'the', 'operation', 'of', 'many', 'knitting', 'frames', '.', 'This', 'specialized', 'latch', 'needle', 'is', 'designed', 'to', 'facilitate', 'the', 'smooth', 'formation', 'of', 'stitches', '.', 'When', 'the', 'hinged', 'piece', 'at', 'the', 'base', 'of', 'the', 'hook', 'is', 'lifted', ',', 'it', 'tumbles', 'over', 'into', 'place', ',', 'creating', 'a', 'secure', 'loop', 'for', 'the', 'yarn', '.', 'This', 'mechanism', 'allows', 'for', 'high-speed', 'knitting', 'and', 'ensures', 'the', 'consistent', 'quality', 'of', 'the', 'fabric', 'produced', '.', 'Innovations', 'in', 'the', 'design', 'of', 'the', 'tumbler-needle', 'have', 'significantly', 'improved', 'the', 'efficiency', 'of', 'textile', 'production', 'over', 'the', 'years', '.']
[[1, 1, 'Textile Machinery']]