As an AI language model, I don't have specific information about all the duplex villas present around the world, but some common types of fire safety features used in duplex villas are:
1. Smoke detectors: Smoke detectors are used to detect smoke and alert the residents in case of a fire.
2. Fire extinguishers: Fire extinguishers are used to extinguish small fires in the initial stage, and they are handy in an emergency situation.
3. Fire-resistant materials: Fire-resistant materials are used in the construction of the duplex to prevent the spread of fire.
4. Sprinkler systems: Sprinkler systems are installed in the duplex to automatically extinguish the fire in case of an emergency.
5. Fire doors: Fire doors are installed in the duplex to prevent the spread of fire and smoke.
6. Emergency exits: Emergency exits are provided in the duplex to ensure the residents can quickly evacuate the premises in case of a fire.
7. Fire safety training: The residents are trained about the fire safety measures, evacuation procedures, and how to use the fire extinguishers in case of an emergency.
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