The effect of prestretching on age?hardening and tensile properties of Al?5.3Cu?0.8Mg?0.3Ag alloy was investigated.是什么意思_The effect of prestretching on age?hardening and tensile properties of Al?5.3Cu?0.8Mg?0.3Ag alloy was investigated.在线翻译_英语_读音_用法_例句