PBG495

The company was founded in 1919 through the merger of eight celluloid companies. With core technologies in cellulose chemistry, organic synthetic chemistry, polymer chemistry, and pyrotechnics engineering, we operate across various fields including chemical products, high-performance materials, and precision pyrotechnic devices, transcending chemical boundaries to develop our business globally. If a type is , no translation is needed, and should be output directly. Output format: Directly output the translated result.