Changing neither the length of overlapping gap nor the Angle of turning corner can assure the rise in shielding effectiveness, rather the specific changing trend is related to frequency range.
改变车身缝隙搭接部分的长度和拐角角度并不能保证提高其屏蔽效能，具体变化趋势与频率范围有关。
Changing volume ratio of the two-chamber muffler can improve the effective noise reduction frequency range of the muffler.
通过改变消声器的两腔容积比，可以改善消声器的有效消声频率范围。
Transmitter has a high frequency stability and big FM deviation and can also operate under the changing of power supply voltage in the range of. 30%.
其发射机频率稳定度高，调制频偏大，在电源电压变化约30%的条件下亦能稳定工作。
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