hysteresis time of primary frequency modulation response
Primary Frequency Modulation
primary frequency regulating
primary frequency standard
stability time of primary frequency modulation
Frequency regulation
频率调整
频率调节
变频调节
变频调速
一次调频
频率控制
频率变化
调频
secondary frequency regulation
transient frequency regulation
net primary production per gross primary production ratio
primary element and primary weight analysis
primary parametric resonance and primary resonance
audio frequency and video frequency processing
correlation in frequency domain and frequency domain
High frequency and low frequency
Low Frequency and Acoustic Frequency
Low Frequency and Medium Frequency Therapy Equipment
theoretical frequency and actual frequency
Accounting information regulation Market failure Asymmetry information Accounting rent-seeking Regulation