The classification of scientific document is an important component of scientific document database.
科技文献的分类是科技文献数据库的重要组成部分。
Typical aero scientific and technical document database at home and abroad are introduced.
介绍了常用的国内外航空科技文献数据库；
Typical aero scientific and technical document database at home and abroad are introduced.
介绍了常用的国内外航空科技文献数据库；
应用推荐