• 1. current induced polarization method: 直流激发极化法
• 2. alternating current induced polarization method: 交流激发极化法
• 3. direct-current induced polarization method: 直流激发极化法

• 1.Two-current IP method predicts water bearing structure in front of the tunnel, based on the effect of water bearing structure upon induced polarization.
  二电流激发极化法是根据含水构造对激发极化效应的影响来预测隧道前方的含水构造的。
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