- vertical echo sounder
- 垂直: perpendicular; vertical; squ ...
- 探鱼仪: echograph,echometer; fish de ...
- 探鱼仪: echometer; fish detector; fish finder; fishgraph; fishscope; sonar; sounder
- 多频探鱼仪: multifrequency sounder
- 回声探鱼仪: acoustic sounderecho soundersonic echo sounder
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