Magnetic field of ground vehicles and warships is ultralowfrequency, alternate and feeble.
车辆及舰船的磁场是超低频交变弱磁场。
2
The formula of waveform distortion is obtained by the approximate result expression of nonlinear equation about ultralowfrequency standard vibrator with this kind of emulsion pipe spring.
同时求解了采用该乳胶管弹簧下的超低频标准振动台的运动方程近似解,得到了波形失真度计算式。
3
QS15 ultra-lowfrequency system is equipped with a 15-inch bass, high energy drive, a well-designed to accommodate the logarithmic horn loaded box in the.