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脉冲信号 pulse signal

脉冲信号pulse signal

把脉 pulse

信号灯 signal lamp

信号灯signal lamp

打旗号 giving flag signal

打旗号giving flag signal

高峰讯灯 peak signal

高峰讯灯peak signal

求救信号 help signal

求救信号help signal

改变先兆 signals for change

改变先兆signals for change

讯号灯坏了 signal light broken

讯号灯坏了signal light broken

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