... 3.Scan mode: A,B,C type Automatic ultrasonic mechanical transmission system1.Multi-channels Ultrasonic scanning equipments2.testing: NDT ... tubes, and book-walled pipe, seamless steel tubes, welded gas and oil pipelines, nonferrous metals, ferrous metals and some non ... tubes, and book-walled pipe, seamless steel tubes, welded gas and oil pipelines, nonferrous metals, ferrous metals and some non ...