广大特材：公司产品不涉及CBF积层绝缘膜

Group 1 - The company stated that its products do not involve CBF laminated insulation film [1] - Some special alloy materials produced by the company are used in the aerospace sector [1] - The company's military-related business involves confidential information that cannot be disclosed [1] Group 2 - The company offers certain mold steel materials, special alloy materials, and some cast steel products that can achieve import substitution [1]