short range laser sonar 近程雷射声纳
short-range sonar 短程声纳
short-range sonar detecting-ranging set 短程声纳测距装置
long-range and short-range side-scan sonar 长距离和短距离侧扫描声纳
"The high frequencies make the bats' sonar beam very focused and short-ranged, " he said.
“高频率声波使得声音束很集中，周期很短。” 他说。
The F is used for short range anti-submarine purpose around the carrier and depends on its own AQS-13F suspensory sonar to detect the submarine.
型则用于航母周围的短距反潜，主要依赖其AQS-13F悬吊声纳探测雷达。
On the base of the active sonar theory, This thesis provide active ultrasonic detecting system that application in low-speed moving object of short-range in shallow sea surroundings.
论文文摘本论文基于主动声纳的基本原理，提出适用于浅海环境水下近程低速目标主动声探测系统。
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