... /USB port 3.Li battery power High-Tech Digital Ultrasonic Flaw Detector Introduction: The digital ultrasonic flaw detector is the portable industrial ... as aerospace, railway transportation and boiler pressure vessels, etc.The digital ultrasonic flaw detector is an essential instrument for non-destructive ... ,50,60,70,80,90, 100,150,200, 250, 300, 350, 400,450,500,600,700,800,900,1000,2000,3000 ...