A-weapon for air defense的用法和样例：
- They seem to forget that the WTO is often used more as a weapon for protectionism than as a shield for open markets.
- One who prepares a nuclear weapon for release.
- The ability of intercepting and tracking for air defense antimissile system can be effectively improved by top observation with aerostat.
- Local people's governments at or above the county level shall, in light of the need of civil air defense, have relevant departments establish mass organizations for air defense.
- The equipment, apparatus and funds needed by mass organizations for air defense shall be provided by competent departments for civil air defense and the units that organize them.