金属探伤 meaning in English

crack detection
metal defect detection
metal inspection

Application of remote multifrequency eddy - current in metal flaw detection
远场多频涡流技术在金属探伤中的应用
Dc testing , applying to transformer and inductor winding copper resistance 、 relay contact resistance 、 switch and socket contact resistance 、 lead resistance 、 compenent solder resistance 、 pcb line and hole resistance 、 metal detection , ect
直流测试，适用于变压器及电感线圈铜阻、继电器接触电阻、开关、接插件接触电阻、导线电阻、元件焊点接触电阻印制板线条及焊孔电阻、金属探伤等。