['The', 'lock', 'stitch', 'carpet', 'sewing', 'machine', 'revolutionized', 'the', 'way', 'carpets', 'were', 'manufactured', 'in', 'the', 'early', '20th', 'century', '.', 'This', 'innovative', 'machine', 'allowed', 'for', 'the', 'rapid', 'stitching', 'of', 'carpet', 'pieces', ',', 'ensuring', 'durability', 'and', 'precision', '.', 'Its', 'design', 'featured', 'a', 'dual', '-', 'thread', 'system', 'that', 'created', 'a', 'strong', 'lock', 'stitch', ',', 'making', 'it', 'ideal', 'for', 'heavy', 'fabrics', '.', 'As', 'carpet', 'production', 'scaled', 'up', ',', 'the', 'lock', 'stitch', 'carpet', 'sewing', 'machine', 'became', 'a', 'staple', 'in', 'textile', 'factories', 'around', 'the', 'world', '.']
[[1, 5, 'Textile Machinery']]