回声探测仪 huíshēngtàncèyí echo sounder Origin Definitions Defs Strokes Stroke Words Sentences Sents 回声 回聲 huíshēng echo the sound of a voice or noise reflected back from a surface探测仪 探測儀 tàncèyí detector an instrument or device used for exploration, detection, or scanning; often refers to precision equipment used in geology, aviation, or medicine