Due to vibration at low frequencies and high power, felt was inserted between the brass bands and the sides of the cores.
由于输出牛在低频率和高功率情况下会产生震动，在铁芯边缘和铜带之间塞入毛毡。
At low frequencies, such as 10 per SEC., pulsation is sensed rather than vibration.
在低频率(譬如每秒十次)时，所感觉到的是脉冲而非振动。
Through the modal analysis, it is found that main vibration modes of floating crane structure are swing of rope-load system and vibration of boom, and the vibration frequencies are low;
通过模态分析发现，浮吊结构的振型主要表现为主钩钢丝绳-吊重系统摆动和臂架振动，振动频率都很低；
It's important to recognize the low-order frequencies and modes of vibration in the course of structural dynamic measurement.
结构的振动测试中，正确识别结构的低阶频率和振型尤为重要。
Ten orders 'natural frequencies had been calculated and low-order vibration shape of the body structure was studied.
通过计算得到前十阶固有频率，并分析了低阶固有模态振型。
The knowing noise of the air compressor "s air dynamic is of low frequencies. The reliable data is provided for the noise and vibration control."
并知空压机的空气动力性噪声呈低频特性，这为噪声及振动控制提供了可靠的依据。
The knowing noise of the air compressor "s air dynamic is of low frequencies. The reliable data is provided for the noise and vibration control."
并知空压机的空气动力性噪声呈低频特性，这为噪声及振动控制提供了可靠的依据。
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