1. Computer room, communication room, program control switch room
2. Laboratory, precision instrument room, spraying workshop, chemical warehouse
3. Oil depots, clean workshops, electronic workshops, and other high-end equipment rooms
4. Archives, libraries, museums, bill rooms, reference rooms, cultural centers, bank vaults
5. Important places such as generator room, power plant, power distribution room, power supply room, etc.
6. Substations, transformer rooms (rooms) and other electrical rooms
7. The First Hospital, TV broadcasting center, financial institutions, government agencies, airports, buildings, docks, garages, etc.