低频

• The application of the assistant soft for sound - box design
  音箱低频特性计算机辅助设计软件的应用
• Verification requlation of the model bx - 21 lf digital phase meter
  Bx - 21型低频数字相位计检定规程
• The design of low frequency narrow band - pass quartz crystal filter
  低频窄带石英晶体滤波器的研制
• Low - frequency spectrometer analyzer with varied parameter filters
  参数可调滤波器的低频频谱分析仪
• Analysis and design of a new ultra - low frequency power source
  一种新型超低频电源的系统分析与设计
• Design of mc - low frequency pulsed strong magnetic fields generator
  型低频脉冲强磁场发生仪的研制
• Low frequency comprehensive magnetism unit
  低频电磁综合治疗机
• Standard colours for insulation for low - frequency cables and wires
  低频电缆和电线用绝缘的标准颜色
• Provides a 6db - per - octave rolloff filter at 115hz
  提供一个115赫兹时每八度6分贝的低频上移滤波器。
• Design of simple low frequency digital phase measurement instrument
  简易低频数字式相位测量仪的设计