| 摘要 |
The frame for the metal cargo door is positioned inside of horizontal channels formed in a flexible door panel. The frame members have a figure of eight cross section. The frame can have an internal cross section similar to the exterior. The figure of eight cross section can be obtained by pressing of a metal tube (2a) with a circular cross section. The frame can have opposed grooves (2a,f) dividing the frame into two distinct spaces.
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