This classification handles various notebooks and paper products used in manufacturing offices and administrative departments. It includes quality control record notebooks, manufacturing instruction sheets, safety management document paper, work daily report notebooks, inspection record sheets, process control chart paper, equipment maintenance record notebooks, and manufacturing history management paper. It targets durable paper that meets manufacturing-specific document management requirements, carbon copy forms, waterproof notebooks, and heavy-duty paper suitable for factory environments, clearly distinguished from industrial paper products (cleaning wipers, packaging kraft paper, abrasive paper, etc.).