Method and apparatus for implementing a hierarchical database managementsystem (HDBMS) using a relational database management system (RDBMS) asthe implementing apparatus?keyword=Method and apparatus for implementing a hierarchical database managementsystem (HDBMS) using a relational database management system (RDBMS) asthe implementing apparatus专利查询检索|Method and apparatus for implementing a hierarchical database managementsystem (HDBMS) using a relational database management system (RDBMS) asthe implementing apparatus?keyword=Method and apparatus for implementing a hierarchical database managementsystem (HDBMS) using a relational database management system (RDBMS) asthe implementing apparatus专利申请-路标网

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