visual alarm
... 警报信号 警报信号 Alarmsignal 可见警报信号 visual alarm 警报信号板 alarm panel ...
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日本沿海筑有长长的大型的防浪墙，海啸警报信号标志也到处可见。
Tsunami warning signs and large seawalls line the Japanese coast.
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Tsunami warning signs and large sea walls line the Japanese coast. Even schoolchildren practice drills on what to do during an earthquake.
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