| 摘要 |
<p>A locking mechanism is provided operable to restrict unauthorised access to a structure such as a house, the locking mechanism being operable to permit external access by means of at least two remote control devices (14), (21), one of the remote control devices (14) being arranged for use by an occupant of the structure and another of the remote control devices (21) being arranged for use by an authorised official such as a police officer, fire officer or safety officer (e.g. a doctor, nurse, paramedic or ambulance personnel).</p> |
