- Bus, train and ship whistle， aerial defence alarm resounds.
- Target recognition is an important research focus of aerial defence in modern times.
- Presently, anti-radiation UAV has become the important aim of the aerial defence weapon.
- Therefore, they have relatively independent financial account system and budget system for aerial defence.
- Based on launch system,electropult currency property technology is analysed simply,which is one of the key technology of aerial defence missile sharing-rack launch.