C振石：子公司振石华风（浙江）碳纤维材料有限公司主要从事风电拉挤型材的生产和销售

Group 1 - The core viewpoint of the article is that the subsidiary Zhenstone Huafeng (Zhejiang) Carbon Fiber Materials Co., Ltd. specializes in the production and sales of wind power pultruded profiles, which are essential for the wind energy sector [2] - Zhenstone (601112.SH) confirmed that its subsidiary primarily produces high-modulus glass fiber pultruded profiles, carbon-glass hybrid pultruded profiles, and carbon fiber pultruded profiles [2] - The products are mainly used in the main beams of wind turbine blades, providing critical material support for the large-scale and lightweight design of the blades [2]