Subcategory of corrugated boxes and packaging boxes used for shipping packaging of finished products and parts, inter-process transportation, and inventory storage in manufacturing industries. Handles corrugated boxes, delivery boxes, returnable boxes, and pallet boxes with strength and sizes specialized for manufacturing products such as mechanical parts, metal processed products, and resin molded products. Industrial specifications emphasizing load-bearing performance, moisture resistance, and cushioning properties to achieve both product protection and logistics efficiency. Classified by shape types (A-type, B-type, C-type, etc.) and strength grades (single, double, etc.), supporting from shipping operations at manufacturing sites to delivery to end customers. Clearly distinguished from other packaging materials such as packaging films and cushioning materials.