| 摘要 |
A door security system serves to substantially improve the reliability of the entire door assembly. The system may consist of up to four or five components. A door jamb shield may be mounted around a door jamb on the side of the door jamb corresponding to the door slab free swinging edge. A door jamb shield may also be mounted on a door jamb on the hinge side of the door jamb. The shield includes a sleeve that wraps on three sides around the door jamb to reinforce and stabilize the door system.
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