Microstructures and mechanical properties of extruded tubes of AZ91+XCa (X=0, 0.5, 1, 1.5 wt. %) alloys were investigated using OM, SEM, XRD and mechanical property test.是什么意思_Microstructures and mechanical properties of extruded tubes of AZ91+XCa (X=0, 0.5, 1, 1.5 wt. %) alloys were investigated using OM, SEM, XRD and mechanical property test.在线翻译_英语_读音_用法_例句