PET铜箔板块震荡走高，铜冠铜箔20cm涨停创新高

Group 1 - The PET copper foil sector is experiencing a significant upward trend, with Tongguan Copper Foil reaching a new high with a 20cm limit increase [1] - Other companies such as Longyang Electronics, Zhongyi Technology, Dongcai Technology, Jiayuan Technology, and Fangbang Co., Ltd. are also seeing gains in their stock prices [1]