echo sounder
noun /ˈekəʊ saʊndə(r)/
/ˈekəʊ saʊndər/
- a device that measures the depth of the sea, or that finds objects underwater, by measuring how quickly sound waves are reflected
| 单词 | echo sounder |
| 释义 | echo soundernoun /ˈekəʊ saʊndə(r)/ /ˈekəʊ saʊndər/
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