1. Big Oil and Gas Pipe and tube detection---Ultrasound 2.reach the ... . ultrasonic flaw detect 1. Big Oil and Gas Pipe and tube detection---Ultrasound 2.reach the demands of ... widely used for titanium tube, zirconium tubes, book-walled pipe, seamless steel tubes, welded gas and oil pipelines, ... strobe, tracking strobe, self locking strobe Marking delay split in two,delay time is 0.5~10S,step 0 ...