A new method with Optical Time Domain Reflectometry Technique for detecting PMD allows network operators to maximize the reuse of existing physical plant.
本文介绍一种基于光时域反射技术的PMD测试新方法，可以保证网络运营商最大程度使用现有通信网络。
The ultrasonic time-domain reflectometry(UTDR) technique is most useful for the in situ monitoring of fouling under realistic operating conditions.
超声时域反射法在实际操作条件下在线监测膜污染显示出独特的作用。
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