我要如何变更参考带宽在OSPF的？
提供了阻带宽度与各结构、材料参数的关系曲线，为工程设计提供了优选结构的参考数据。
The curves of stop band width vs. geometric and constitutive parameters were provided as the optimal structure data for engineering design.
高的频率分辨率要求低的参考频率，这就相应地要求环路的带宽比较窄。
Fine frequency resolution requires a small reference frequency and a correspondingly small loop bandwidth.
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