A device used underwater to produce pulses of sound, as for an echo sounder.
A device used underwater to produce pulses of sound, as for an echo sounder.
声脉冲发送器置于水下产生声脉冲的装置，如回音器中的装置
A device used underwater to produce pulses of sound, as for an echo sounder.
声脉冲发送器置于水下产生声脉冲的装置，如回音器中的装置