| 摘要 |
The frame has a U-section (1) fixed to the tilting support frame via fixing holes (9). The U-section extends across the door and across the reinforcing plate (10) by holes (11). It is then locked by a lock assembly (13) of which the lugs (14) fit into the notches (6) of the cross bar (3,4). The U-section is hollowed along the cross bars to allow adjustment to different sized doors.
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