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two-level signal

auto. 双亮度信号在白天和夜间有不同亮度的转向和制动信号
tech. 双亮度信号灯
two-level
: 96 phrases in 21 subjects
Air defense1
Artificial intelligence1
Aviation1
Biotechnology1
Bridge construction3
Business1
Economics1
Electronics12
General4
Hydroelectric power stations2
Information technology6
Materials science1
Metallurgy2
Oil / petroleum2
Physics1
Plastics4
Scientific3
Space8
Technology40
Telecommunications1
Wind Energy1

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