| 摘要 |
<p>The fitting has an opening (4) provided between a pusher opening (2) and screw openings (3), where the opening (4) is designed for an optical alarm system. Loud speakers (8, 9) are respectively provided between the pusher opening and a cylindrical key opening (6), and the screw openings and the key opening. The loud speakers are designed for an acoustic alarm system, and three openings (7) are provided for three switches of the alarm system. Two plates are provided on a side view of the door fitting that is made of metal (1). An independent claim is also included for a plastic ring of a door fitting for supporting a notch.</p> |
