['In', 'the', 'early', '20th', 'century', ',', 'the', 'introduction', 'of', 'automatic', 'looms', 'revolutionized', 'the', 'textile', 'industry', '.', 'These', 'looms', 'utilized', 'advanced', 'heald', 'shafts', ',', 'which', 'allowed', 'for', 'more', 'efficient', 'weaving', 'processes', '.', 'The', 'heald', 'shafts', 'played', 'a', 'crucial', 'role', 'in', 'controlling', 'the', 'warp', 'threads', ',', 'ensuring', 'a', 'consistent', 'and', 'high-quality', 'fabric', '.', 'Manufacturers', 'began', 'to', 'focus', 'on', 'improving', 'the', 'design', 'and', 'functionality', 'of', 'these', 'heald', 'shafts', ',', 'leading', 'to', 'innovations', 'in', 'textile', 'machinery', '.', 'The', 'integration', 'of', 'heald', 'shafts', 'into', 'the', 'weaving', 'process', 'marked', 'a', 'significant', 'advancement', 'in', 'fabric', 'production', '.']
[[20, 21, 'Textile Machinery']]