华明装备：公司的主要业务是变压器分接开关，通常应用于35kV及以上的变压器

Group 1 - The company primarily focuses on transformer tap changers, typically used for transformers rated at 35kV and above [2] - In the wind power sector, the company's products may be utilized in the booster stations of wind power generation projects, but the annual demand is relatively limited [2]