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The principle of OTDR (Optical Time Domain Reflectometry) for faults location and application of OTDR method is discussed.
探讨了OTDR（光时域反射计）故障定位的原理，说明了OTDR的使用方法。
According to the principles of time domain reflectometry, a new kind of sensor of soil water content measurement is explored.
根据时域反射技术原理，研制了测量土壤含水率的一种新型传感器。
According to the case of monitoring landslide, brings up the field method about the use of Time Domain Reflectometry (TDR) for monitoring landslide.
依据时间域反射测试技术(TDR)的基本原理，提出了TDR技术在滑坡监测中的野外工作方法。
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