| 摘要 |
A doorjamb strengthening device comprising an interior metal plate (1), a primary interior cylindrical reinforcing member (5), an aperture (11), a secondary cylindrical reinforcing member (6), an exterior metal plate (2), a primary exterior cylindrical reinforcing member (9), and a secondary exterior cylindrical connecting member (10). First metal plate is fastened to second metal plate by an interference fit between said primary interior cylindrical reinforcing member and said primary exterior cylindrical reinforcing member and said secondary interior cylindrical connecting member and said secondary exterior cylindrical connecting member.
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