very-low frequency band 甚低频频带
very low frequency band 甚低频波段
extremely low frequency band 极低频带
transformer in low frequency band 低频变压器
low band frequency 低频带频率
low frequency sub-band image 低频子带图像
It is easy to observe slow P-wave in the condition of large porosity and low frequency band.
低频、高孔隙度条件更有利于慢纵波的观测。
The method can directly detect the fault characteristic signals in low frequency band and achieve fault diagnosis.
该方法直接检测故障的低频特征信号，完成故障诊断。
The fault characteristic periodic signals of the rolling bearing are in low frequency band and often buried in the noise.
反映滚动轴承故障的特征周期信号处于较低频带内，容易被噪声淹没，难以检测。
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