engaged line


  • 翻译:占线,忙线

同义词

1)engaged line,占线,忙线2)busy line,忙线;占用线3)busy tone,忙音,占线音4)BT Busy Tone,占线音,忙音5)all busy,all-paths-busy,全忙;全部占线6)busy back,busy back signal,busy signal,占线信号;忙信号

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