您要查找的是不是：
- directional echo sounding 定向回声测深
- A device used underwater to produce pulses of sound, as for an echo sounder. 声脉冲发送器置于水下产生声脉冲的装置，如回音器中的装置
- Echo sounding devices were early used in making maps of the ocean floor. 讲的是回声定位仪器最早用于绘制海底地图。很容易找到对应的答案。
- Love falls in love with love, comes like an echo sounding back, searches its mirrored shadow within a look. 爱与爱彼此相恋,犹如回声在激荡,寻找镜中的影像,在短暂的一瞥中。
- In order to inspect the pipeline position and quantitate the pipeline settling depth, the single-beam echo sounding technique is used in submarine pipeline inspection. 摘要为查明海底管道的位置和掩埋状态，在海底管道检测中使用了单波束测深技术。
- In an ideal situation, the transmitting wave would experience reflections and attenuation between layers.This would directly effete the radar echo sounding. 较为理想的情况现下:入射波在进入深层反射面之前要经过多层介质面的反射,及各层介质中衰减,这直接影响入射信号能否到达深层反射面而产生回波。
- The precise positioning, satellite altometering, Multi-beam echo sounding, synchronization of different elements, offsets correction and modeling of charted sounding etc. 这种强烈的反差和不和谐催生了海道测量理论和技术方法的变革。
- A device used underwater to produce pulses of sound,as for an echo sounder. 声脉冲发送器置于水下产生声脉冲的装置，如回音器中的装置。
- The wall can optimally absorb the echoing sound. 这墙能极有效地吸收回声。
- non directional current protection 非方向电粒护装置
- Non Directional Radio Homing Beacon 无方向性无线电归航信标
- Inspection installation and water tight transducer of echo sounder on berth. 测深仪的换能器船台安装和水密性检查。
- This work has been focused on the use of copper(I)-mediated anti-SN2’ allylic substitution reactions with non directing leaving groups. 论文提要内容： 在变化的经营环境当中，为了生存和发展，组织必须更灵活、弹性地加以应对。
- Inspection installation and water tightness transducer of echo sounder on berth. 测深仪换能器船台安装和水密性检查。
- But your voice also gets distorted so that each succeeding echo sounds less like the original sound. 但你的声音也被改变使得每次的回声变得越来越不像原来的声音。
- In bathymetric survey, the recorded seabed is distorted due to the beam-width of the echo sounder. 摘要在海底地形测量中，由于波束角效应导致探测的海底地形存在失真。
- The beam angle can badly influence the inspection ability of the single beam echo sounder. 波束角会严重影响单波束对海底管道的探测能力。
- Good toys for this exercise range from inexpensive plastic echo sound microphones to tape recorders, and even higher rpices karaoke machines that can be hookes up to you television. 模仿卡通片角色说话，比如唐老鸭或者怪兽什么的。）
- This non sequitur invalidates his argument. 他不根据前提推理因而论证无效。
- The familiar and echoing sound of pianos from Gulangyu is his nostalgia. 那回荡着的熟悉的鼓浪屿钢琴声就是他的乡愁。
