1. Big Oil and Gas Pipe and tube detection---Ultrasound 2.reach the demands of 128 or more channels 3. ultrasonic ... flaw detect 1. Big Oil and Gas Pipe and tube detection---Ultrasound 2.reach the demands of 128 or more channels3 ... -100dB,step 0.1dBDetection channels 1,2,4,8,16 Operation mode Single probe transmitter and receiver, dual probe transmitter and receiverScan mode A,B,C ...