14 صفحه pdf
BS EN 27963:1992/ ISO 7963:1985
Specification for Calibration block No. 2 for ultrasonic examination of welds
BS EN 27963:1992/ ISO 7963:1985
14 صفحه pdf
BS EN 27963:1992/ ISO 7963:1985
Specification for Calibration block No. 2 for ultrasonic examination of welds