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1 2 ?拉响警报 ... Invent：发明 Sound alarm：拉响警报 Existential：生存性的 ...
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Waterflow indicator used to sound alarm, light signal, actuate relays or starter switches for motors, pumps, etc., when low occurs. 流量指示器用于声音报警，灯光报警，当流量发生时启动电机、泵等继电器或起动器开关。 - 2
In the rich world a ratio of more than four would sound alarm bells; in other Asian countries prices are typically 5-7 times income. 在发达国家高于4倍的比例足以引起警戒；在其他亚洲国家比较典型的数据是5 - 7倍。 - 3
Waterflow indicator used to sound alarm, light signal, actuate relays or starter switches for motors, pumps, etc. , when no flow occurs. 流量开关用于声音报警，灯光报警，当无流量时启动电机、泵等继电器或起动器开关。
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