| 摘要 |
The device comprises a receiving frame (2) fastened on an installation frame (3) by a bracket. The receiving frame is movable along the bracket between a seating position on one end of the bracket, and a bearing position on the bracket's end facing the installation frame. The installation frame is U-shaped with two sides connected by a cross-piece. The installation frame and/or the receiving frame consists of profiled elements which are rectangular in cross-section.
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