中海达：目前公司核心技术自主可控，无美国引进技术

Core Viewpoint - The company has complete control over its core technology and does not rely on technology imported from the United States [1] Group 1: Technology and Supply Chain - The company imports a minimal amount of raw materials from the United States, with domestic alternatives available [1] - The company's core technology is fully self-sufficient and does not depend on U.S. technology [1] Group 2: Market and Sales Impact - The company's international business primarily targets markets in Asia, South America, and Europe, with no sales in the United States [1] - The company is not affected by the U.S. tariff policies due to its lack of sales in the U.S. market [1]