振石股份：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 Zhenstone Co., Ltd. (振石股份) has a wholly-owned subsidiary, Zhenstone Huafeng (Zhejiang) Carbon Fiber Materials Co., Ltd., which specializes in the production and sales of wind power pultruded profiles [2] - The main products of Zhenstone Huafeng include high-modulus glass fiber pultruded profiles, carbon-glass hybrid pultruded profiles, and carbon fiber pultruded profiles [2] - These products are primarily used in the main beams of wind turbine blades, providing essential material support for the large-scale and lightweight design of the blades [2]