• 1. long time delay phase: 长延时
• 2. long-time-delay phase trip element: 长时间延迟相位跳闸元件

• 1.In this paper we introduce the developmental phase and experimental equipments of long time delay phase-locked loop and also give the field test results via the satellite "Symphonic".
  本文叙述了长延时锁相环的研制情况和实验设备，同时也给出了通过“交响乐”卫星的现场试验结果。
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