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介绍一种探测金属锚杆位置的仪器。该仪器以单片机为核心，兼有减幅式探测深度较大和差频式分辨能力较强的双重优点。
An instrument to detect the position of a metal anchor is introduced. The instrument to the microcontroller as the core, both reduced detection depth and differential frequency resolution strong dual advantages.