Joke Collection Website - Bulletin headlines - What are the five civil air defense systems in the parking lot?

What are the five civil air defense systems in the parking lot?

The five systems of civil air defense in parking lot actually refer to the five systems of civil air defense engineering.

Its contents include: 1 civil air defense engineering maintenance management system 2. Civil air defense engineering maintenance management post responsibility system 3. Civil air defense engineering regular inspection maintenance system 4. Civil air defense engineering maintenance file system 5. Civil air defense engineering fire management system.