1. Nuclear energy facilities and radioactive materials: The ownership and operation of nuclear energy facilities and the handling of radioactive materials require special licenses and regulations, and private ownership by individuals is not allowed.
2. Medical drugs and devices: Certain specific medical drugs and devices require special licenses for legal possession and use to ensure public health and safety.
3. Specialized equipment for specific industries: Certain industries (e.g., medical, chemical, military, etc.) require specific specialized equipment, which may be legally restricted to use by specific organizations or personnel.