ping·er 
(pĭngər)
(pĭngər)n.
A device used underwater to produce pulses of sound, as for an echo sounder or a locator device.
| 单词 | pinger |
| 释义 | ping·er (pĭngər)n. A device used underwater to produce pulses of sound, as for an echo sounder or a locator device. |
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