机构：美国4月进口精炼铜创历史新高

Group 1 - The core point of the article is that the import of refined copper to the United States reached a record high in April, exceeding 170,000 tons, marking the highest level since data collection began in 2014 [1] - If confirmed by U.S. government trade data, this figure would surpass the previous record of approximately 142,000 tons set in November 2001 [1]