filter crystal meaning in English

晶体滤波器
滤波晶体
滤波器晶体

Methods for the measurement of frequency and equivalent resistance of unwanted resonances of filter crystal units
滤波器晶体单元的无用谐振频率和等效电阻的测量方法
Quartz crystal units ; methods for the measurement of frequency and equivalent resistance of unwanted resonances of filter crystal units
压电石英器件.测量方法.滤波器晶体附加谐振的频率和