超声波数字水位计
ultrasonic digital water level gauge
超声回波脉冲数字式测厚仪
ultrasonic echo-impulse digital thickness meter
数字超声波测深仪
digital ultrasonic echo-sounder
数字超声列车车轴多波检测仪
digital ultrasonic train axle multi-wave detector
数字式超声波测厚仪
digital ultrasonic thickness gauge
数字式超声波探伤仪
digital ultrasonic flaw detector
数字型超声波检测仪
digital ultrasonic inspection instrument
数字-数字数据变换器
digital-to-digital data converter
带正负号数字数字系统
signed digit number system
Sony数字数据接口
Sony digital data interface
波数波频滤波
wavenumber-frequency filtering
波数波频谱
wave number-frequency spectrum
常规数字波束形成
con- ventional digital beam form