日科化学：公司主营业务聚焦于塑料和橡胶改性剂等相关产品的研发、生产与销售

Group 1 - The company, 日科化学, focuses on the research, production, and sales of plastic and rubber modifiers and related products [1] - The core products of the company are not directly related to epichlorohydrin [1]