通过浅水域时，要常用回声仪测深。
在煤层气井排采过程中，通常用回声仪来监测环空液面变化，通过控制液面下降速度来实现稳定、连续降压。
The echometer was used to monitor the change of the annular water level in the coal- bed methane(CBM)wells production, which could decrease pressure stably and continuously.
在煤层气井排采过程中，通常用回声仪来监测环空液面变化，通过控制液面下降速度来实现稳定、连续降压。
Changes of liquid level are usually monitored with echometers and stable decompression is achieved by controlling the reducing rate of the liquid level.
这样就产生了目前各种船舶上普遍应用的回声探测仪。
So was born the echo-sounding apparatus, now in general use in ships.
在海洋测深过程中，回声测深仪波束角效应使记录的测深图像失真。
In bathymetric survey, the record seabed image is distorted due to the angular beam width of an echo sounder.
回声测深仪在导航仪器中的地位在下降，其原因是它存在着较多的误差。
The echo sounder is now gradually out of use in navigation, because it has many errors.
回声测深仪是用来测量水深的一种声学测量设备，其以水中超声波的传播速度为确定条件，利用发射波与反射回波时间差来测量水深。
Echo Sounder is a kind of acoustic measuring depth equipment, which can measure depth with the time between transmitted wave and echo on condition in which the speed of ultrasonic is fixed.
本文在介绍回声测深仪基本工作原理的同时，介绍了回声测深仪在杭州湾口外一拟建大型码头水下地形测量的一个应用实例。
The paper briefs the basic principles of the fathometer and its application to submerged landform measurement near a planned large dock out of the Hangzhou Bay.
在海洋测深中，由于回声测深仪波束角效应的影响，对凸形海底的测量会带来较大的失真。
The record seabed image distorted due to the angular beam-width of echo-sounder in bathymetric, especially for gibbous terrain.
方法采用超声仪检测3 6例胆囊切除术后患者的肝内外胆管， 测量胆管内径，观察管腔内回声。
Methods The ultrasonic features of 36 cases with biliary duct disease post Cholecystectomy were analysed. The biliary duct diameter and the echo characteristics inside duct were examined.
方法：采用超声仪探查23例患儿病变区的位置、大小形态和内部回声情况，并将结果与手术及病理发现相比较。
Methods 23 cases were examined by ultrasound to assess the location, extension and internal echo structure of the lesion. The results of ultrasonography were compared with those of surgery findings.
方法：采用超声仪探查23例患儿病变区的位置、大小形态和内部回声情况，并将结果与手术及病理发现相比较。
Methods 23 cases were examined by ultrasound to assess the location, extension and internal echo structure of the lesion. The results of ultrasonography were compared with those of surgery findings.
应用推荐