| 释义 |
sonic depth finder
释义
[测] 回声测深仪；声深度观察装置
例句
1·With help of a sonic depth -finder a proper shoal gets detected and the fishermen prepare special devices which look something like spinnings and attached to the handrails.
用超声波探测器可以定位鱼群，渔民们准备一种特别的装置：看起来象连着扶手的陀螺。
同义词
[测]回声测深仪；声深度观察装置
fathometer
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