Characterization and testing technology for metallic materials 并列题名:Characterization and testing technology for metallic materials Characterization technology for engineering materials Analytic and testing technology of materials Inspection and testing technology for internet of things Characterization technologies for optoelectronic materials Ultrasonic vibration assisted drilling technology for composite materials characterization and evaluation of materials. Characterization of tribological materials Lost foam compound casting technology of Mg/Al bimetallic material