Specialized protective films and cases for industrial smartphones and tablet devices used in manufacturing environments, designed for screen protection and device protection. Features impact resistance, dust-proof and waterproof performance, specifically designed for terminal protection in harsh manufacturing environments. Includes LCD protective films, tempered glass films, dust-proof films, shock-resistant cases, waterproof cases, and cases with hand straps. Positioned as protective equipment to prevent device damage and maintain work efficiency when using quality control systems and production management applications.