['In', 'the', 'early', '20th', 'century', ',', 'the', 'flax-hackling', 'machine', 'became', 'essential', 'for', 'preparing', 'flax', 'fibers', '.', 'Among', 'its', 'various', 'components', ',', 'the', 'brush', 'and', 'doffer', 'played', 'a', 'crucial', 'role', '.', 'The', 'brush', 'was', 'designed', 'to', 'clean', 'the', 'hackling', 'rods', ',', 'ensuring', 'that', 'the', 'fibers', 'were', 'free', 'from', 'impurities', ',', 'while', 'the', 'doffer', 'removed', 'the', 'clean', 'fibers', ',', 'allowing', 'for', 'uninterrupted', 'processing', '.', 'This', 'combination', 'greatly', 'improved', 'efficiency', 'in', 'the', 'textile', 'industry', ',', 'making', 'the', 'flax-hackling', 'machine', 'a', 'vital', 'asset', 'for', 'producers', '.']
[[22, 24, 'Textile Machinery'], [7, 8, 'Textile Machinery']]