直: straight; stiff读: read aloud式: type; style频率计: frequency meter; frequency i ...桥式频率计: frequency maeasuring bridge; frequency measuring bridge直读频率计: direct reading frequency meter凹腔式频率计: reentrant type frequency meter传输式频率计: tra mi ion type frequency meter; transmission type frequency meter; transmission type meter; transmission-type meter电桥式频率计: bridge type frequency meter; bridge type frequencymeter电声式频率计: electroacoustic frequency meter反馈式频率计: reaction type frequency meter感应式频率计: induction type frequency meter簧片式频率计: reed frequency meter计数式频率计: counter type frequency meter; counter-type frequency meter; counting type frequency meter记录式频率计: recording frequency meter检波式频率计: detector frequency meter数字式频率计: dfm digital frequency meter; digital frequency counter; digital frequency meter同轴式频率计: coaxial frequency meter透过式频率计: transmission frequency meter外差式频率计: heterodyne frequency meter; heterodyne frequencymeter; heterodyne-type frequency meter吸收式频率计: a orption meter &;am lt;&;am gt; absorption frequency meter; absorption type freguency meter谐簧式频率计: tuned reed frequency meter谐振式频率计: resonance frequency meter; resonant frequency meter振动式频率计: resonance frequency indicator; sonometer; vibration type frequency meter; vibration-type freguency meter振簧式频率计: vibrating reed frequency meter; vibrating reed type frequency meter; vibrating-reed frequency meter; vibrating-reed meter