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commutation signaling | |||
figure signal | |||
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signal of change; signals of change |
变 换 信号 : 34 phrases in 11 subjects |
Air defense | 2 |
Automobiles | 1 |
Aviation | 3 |
Business | 1 |
Computers | 2 |
Earth sciences | 1 |
General | 2 |
Information technology | 2 |
Space | 5 |
Technology | 12 |
Telecommunications | 3 |