echo dapth sounder回波测深仪
sonic echo-sounder声波回声测深仪
echo-sounder回声探深仪;回声测深仪;潨;测深仪
echo depth sounder回声测深仪;回音测深仪
inverted echo-sounder倒置回声测声仪
digital echo-sounder数字显示式回声测声仪
Echo-sounder instrumental errors仪器
digital ultrasonic echo-sounder数字超声波测深仪
double-chan excellentnel echo well sounder双通道回声井深测试仪
N（名词） a navigation and position-finding device that determines depth by measuring the time taken for a pulse of high-frequency sound to reach the sea bed or a submerged object and for the echo to return 回声测深仪