... Multi-channel Ultrasonic flaw detector machine for big size tube 2.reach the demands of 128 or more channels3. ... performance ratio.The instruments can be widely used for titanium tube, zirconium tubes, book-walled pipe, seamless steel tubes, ... tracking strobe, self locking strobe Marking delay split in two,delay time is 0.5~10S,step 0.1S ... channel Ultrasonic flaw detector machine for big size tube