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2007航空航天金属加工技术交流会在7月的上海圆满结束了。在交流会进行期间以及结束后,多位与会听众通过交谈、提问、填写调查表等形式向我
2007 aerospace metal processing technology conference in Shanghai in July successfully concluded. During and after the exchange meeting, many participants listened to me by chatting, asking questions and completing questionnaires