研究了埋地管道泄漏信号波的传播方程，泄漏信号频率特性以及衰减方程。
The buried pipe transfer equation, the frequency character and the attenuation equation of the leak signal are studied.
它可有效滤除衰减直流分量并具有较好的频率特性与较高的计算精度。
It can filter efficiently decaying DC component, has clear frequency characteristic, and make calculation with high precision.
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