aerial defense group的用法和样例：
- According as principle of efficiency aerial defense,area of aerial defense can be compartmentalized surveillance section,annihilation section and survival section.
- The 132-metre high building has 34 floors including two-tier basement.The lowest is for aerial defense and used as normal carport in peace time, the second basement floor is mechanical carport.
- Velocity of aerial defense missile, which is used to intercept TBM, is very high, so pneumatic pyrogenation is terrible.Side window detection is used to decreasing pneumatic pyrogenation.
- Washington D.C.) US Congressmen are planning to call up sci-tech experts to join in a defense group like the national militias to safeguard the country's communication systems from terrorist attacks.