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  1. Oxford American Dictionary

    echo sounder

    • IPA[ˈekō ˌsoundər]

    美式

    • n.
      a device for determining the depth of the seabed or detecting objects in water by measuring the time taken for sound echoes to return to the listener.

    • noun: echo sounder, plural noun: echo sounders

    • 更多解釋

    echo sounder

    英式

    • n.
      a device for determining the depth of the seabed or detecting objects in water by measuring the ...

    Oxford Dictionary