| 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> |
