... Low wind-speed type 2. Grid-friendly type: 3.Maintenance-free yaw bearing 4. IEC61400&Det Norske Veritas approved 2MW wind force turbine ... , and the technology advantages are as follows: 1. Low wind-speed type: Designed according to IECⅡB ,ⅢA standard, and ... Energy Science& technology Limited Company, Inner Mongolia Dongxing Fengying Wind Power Equipment Co., Ltd, and Guizhou Fengying Energy Science& ...