The law ofpermeability changes of different frequency range was studied during the wire rope fatigue test.
研究了钢丝绳弯曲疲劳历程中，磁导率在不同空间频率区间的变化规律。
Every 90 seconds, the array switches to looking at a different star, or a different frequency range, and a new image is generated.
因为每隔90秒望远镜阵列就会切换观测另外一个星体或者一个不同的频段，一幅新的信息转换成的图像就会显示出来。
From the result, we know the fan noise is mostly a width frequency noise, then obtain the effect of the fan noise on the engine noise in the different frequency range.
试验结果表明，风扇噪声主要是宽频带噪声，并得出了在不同频率范围风扇噪声对发动机噪声的影响。
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