短語詞組短語ultrasonic c flaw detector 超聲波探傷器;超聲探傷儀ultrasonic nondestructive flaw detector 超聲波無損探傷digital ultrasonic flaw detector 數(shù)字超聲探傷儀Ultrasonic Flaw Detector for Rail 鋼軌超聲波探傷儀檢定規(guī)程a -mode ultrsonic flw detector 型超探儀 返回 ultrasonic flaw detector