Auxiliary primary frequency regulation  辅助一次调频; 智能建筑集成管理系统

Primary Frequency Regulation Test  一次调频试验

THE PRIMARY FREQUENCY REGULATION  一次调频

primary frequency regulation PFR  一次调频

frequency primary standard  频率基准

hysteresis time of primary frequency modulation response  一次调频响应滞后时间

power system primary frequency control  电力系统一次调频

Primary Frequency  主频; 基频; 主用频率; 一次调频; 主频率

Primary Frequency Adjusting  一次调频

Primary Frequency Adjustment  一次调频

Primary Frequency Control  一次调频

Primary Frequency Modulation  一次调频

Primary Frequency Modulation Function  一次调频

primary frequency regulating  一次调频

primary frequency standard  原始频率基准; 频率基准

primary frequency zone  主频区

primary regulation  一次调节; 一次调频

stability time of primary frequency modulation  一次调频稳定时间

variable frequency primary pump system  一次泵变频系统