| 摘要 |
The derailler comprises a support 4 for a chain guiding device 12, 13 which is connected to the support by a deformable articulation structure which, under the action of a pulling cable, positions the chain guiding device relative to the free-wheel sprockets. The deformable articulation structure comprises a deformable quadrilateral structure 6, 7 to 11, at least two sides of which quadrilateral structure are unequal.
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