| 摘要 |
A secondary door such as a screen or storm door is mounted within a door frame comprising channel elements readily attachable and separable from one another. The channel elements are of standard sizes to fit over either standard front or standard rear door stops of the jamb and lintel of a permanent door frame. The channel elements are not affixed or attached to the permanent door frame in any manner whatsoever, so that neither hardware such as screws or bolts, nor the use of any tools, is required to install or remove the secondary door.
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