Model 25DL PLUS Digital Ultrasonic Multi-Mode Thickness Gage, AC or Battery Operation, 50-60 Hz, with Internal Alphanumeric Datalogger.是什么意思_Model 25DL PLUS Digital Ultrasonic Multi-Mode Thickness Gage, AC or Battery Operation, 50-60 Hz, with Internal Alphanumeric Datalogger.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句