简要介绍地音探测器的基本原理，SN - 4数字检波器的频率特性。
In this paper, the basic principle of geophone detector and the frequency characteristics of SN-4 digital detector are briefly introduced.
简要介绍地音探测器的基本原理，SN - 4数字检波器的频率特性。
In this paper, the basic principle of geophone detector and the frequency characteristics of SN-4 digital detector are briefly introduced.
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