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。
Based on acoustics, one can study the testing depth of sonic logging.
从波动声学的角度讨论声波测井的探测深度问题。
This system consists of sonic sonde, magnetic locator sub, gamma ray tool, depth system, surface preprocessing unit, data acquisition interface, PC486 and thermal plotter.
该系统由声波、磁定位和自然伽马下井仪、深度系统、地面预处理电路、数据采集控制接口电路、486微机和热敏绘图仪等构成。
应用推荐