English translation for "空线信号"
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- free line signal
- Similar Words：
- "空险" English translation, "空险, 空运保险" English translation, "空县" English translation, "空线" English translation, "空线，电路" English translation, "空线信号灯" English translation, "空线指示器" English translation, "空线指示信号" English translation, "空线终端网络" English translation, "空线状态, 未占线状态" English translation
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