| 摘要 |
Telescopic rail system comprising C-shaped outer rails (12), C-shaped middle rails (13) and I-shaped inner rails (14), as those mounted particularly on vehicle doors. Heretofore, those systems where provided with series of steel bearing balls in races. The invention proposes to arrange balls in contact between them, without races, and to use alternatingly steel and plastic balls. In the preferred form of execution, 2-3 steel balls will be used at each end of the rails. |
