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1990年5月15日至17日部质量司在621所召开了航空科学技术研究院所属15个基础研究院、所质量保证体系研讨会。
From May 15th to May 17th, 1990, the Department of Quality and Quality held the symposium of 15 basic research institutes and quality assurance systems affiliated to the Academy of Aeronautical Science and Technology.