| 摘要 |
The roof rack is equipped with two parallel tracks having a roof section and a pivotal auxiliary section. For loading or unloading articles, the auxiliary sections are positioned to extend outward and downward from the ends of the roof sections for forming a continuous, rigid track. Sleighs can be displaced along these tracks. The sleighs are guided such that they are not tilted but retain their orientation during displacement. The roof rack is easy to construct and also suitable for heavy and high articles.
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