天海防务：公司主营业务涉及船海工程、防务装备、新能源三大业务领域

Group 1 - The company, Tianhai Defense (300008), has indicated that its main business areas include marine engineering, defense equipment, and new energy [1] - Currently, the company does not have a strategic layout in the field of combustible ice mining equipment [1] - For specific details regarding the company's business operations, it is recommended to refer to the company's regular reports [1]