直线频率
straight-line frequency
指定频率
asigned frequcncy
指画幅频率即胶片运速
film speed
中间临界频率
intermediate critical frequeney
中心频率
center frequency
重复频率
repeat frequency rate
主共振频率
principal resonant frequency
主时钟频率
master clock frequency
转差频率
slip frequency
转动频率
rotor frequency
转换频率
inversion frequency
转移频率
transition frequency; turnover frequency
撞击频率
collision frequency
追逐频率
hunting frequency
自差式频率计
autodyne frequency meter
自动频率控制
AFC
自动频率控制电路
automatic frequency control
自然频率
natural frequency
执行主席
presiding chairman
直接的领主和租借人
very lord and very tenant