| 2. | Then, according to the requirement analysis, concept design, logic design and database design, the electronic instrument failure rate database was designed and the components failure rates and n factors in gjb / z299b-98 were established in the database
其次，按照开发关系型数据库所要求的需求分析、概念设计、逻辑设计和物理设计四个阶段，设计了电子设备失效率数据库并做了数据录库工作。 |
