低频

• A low frequency hydraulic vibrator for water injection
  低频水力振动注水器
• 1 harmonic distortion at low amplitudes is limited by a
  1低频谐波失真受- 70dbm本底限制
• Study on vibration sensor of ultra - low frequency
  超低频振动传感器的研究
• Verification reguiation of xfd - 7a type lf signal generator
  型低频信号发生器试行检定规程
• Sub - bass synthesis with intensity control
  电平强度可控次低频综合效果。
• Verification regulation of super - low frequency signal generator
  超低频信号发生器检定规程
• Study on ultra - low frequency vibration sensor
  超低频振动传感器的研究
• Grading standard of quality for low frequency signal generators
  低频信号发生器质量分等标准
• Testing methods for low frequency transformers and inductors
  低频变压器和电感线圈的测试方法
• Test methods for general purpose low frequency signal generators
  低频信号发生器通用测试方法