最终，电子飞行显示在所有商用飞机成为主流设备。
Eventually electronic flight displays became mainstream equipment on all commercial aircraft.
主要应用： 商用及工业用通风空调系统的主流化学过滤器， 性能卓越，安装维护方便快捷。 电子工厂博物馆。
Applications: Main chemical filters for most commercial&industrial ventilation system, with high performance, easy maintenance and raplacement. Microelectronics. Museum, etc.
大多数主流商用数据库产品安全级别较低，从实际角度考虑提出通过安全增强系统提高数据库系统安全性。
Most of the commercial DBMS products are lower in the security class ratings. Considering facts, a scheme to strengthen the security of database by a security enhanced system is proposed.
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