中国航天工业总公司第十三专业信息网 99131会议于 1999年 10月 12日～ 15日在西安市航天科苑召开。这是本世纪的最后一次交流会 ,本届交流会由航天科技集团第四研究院陕西非金属材料工艺研究所主办 ,来自航天系统 11个单位的 37名代表参加了本次会议。会议主题是“航天新材料 China Aerospace Industry Corporation thirteenth professional information network 99131 meeting on October 12, 1999 to 15 days held in Xi’an Aerospace Science Park. This is the last exchange meeting of this century. The exchange was sponsored by the Shaanxi Institute of Nonmetallic Materials Technology of the Fourth Research Institute of Aerospace Science and Technology Corporation. 37 delegates from 11 units of aerospace system attended this conference. The theme of the conference is "Aerospace New Materials