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to phrases
line signal
el.
呼叫〔振铃〕信号
IT
线路信号
指示灯
mil., air.def.
行信号
tech.
振铃信号
telecom.
线路信号
人工交换台的来话呼叫信号
line signal:
63 phrases
in 16 subjects
Advertising
1
Air defense
3
Automobiles
1
Badminton
1
Communications
4
Electronics
15
General
1
Information technology
7
Nautical
1
Oil / petroleum
2
Project management
1
Scuba diving
1
Space
2
Submarines
3
Technology
18
Telecommunications
2
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