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Acoustic retreat signal for fire party is one long blast with signal whistle.
灭火队的声觉撤退信号是一长声声号。
youdao
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Signal design is the key in a multi-target underwater acoustic positioning system.
信号设计是多目标水声定位系统的关键。
youdao
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Signal design is the key in a multi-target underwater acoustic positioning system.
信号设计是多目标水声定位系统的关键。
youdao