美国宣布将对进口铜产品征收50%关税

Group 1 - The core point of the article is that President Trump has announced a 50% tariff on imported copper semi-finished products and high-copper-content derivatives starting from August 1 [1] Group 2 - The announcement was made on July 30, as reported by Xinhua News Agency [1] - The decision is part of the broader trade policy measures being implemented by the U.S. government [1] - This tariff could significantly impact industries reliant on copper imports, potentially leading to increased costs for manufacturers [1]