频率频率开关  Frequency

变频风机  frequency conversion fan

大功率风机  great power fan

大功率风机和泵调速  high power fan and pump drives

风机风道  blower’s air duct

风机风量  fan delivery; air volume of blower

风机机械特性曲线  mechanical characteristic curve of fan

风机机组  Fan set of machines

风机机组效率  fan unit efficiency

风频率  windfrequence

鼓风机风道  air drift

鼓风机风压  blower pressure

强制通风风机  forced ventilation fan

扇风机风道  fan drift

扇风机风巷  Fan

扇风机风巷风门  fan-drift

台风频率  typhoon frequency

阵风频率  gust frequency

阵风频率间隔  gust frequency interval