| 摘要 |
An assembly of a brake disk and a hub includes an axle extending through a passage in the hub and a plurality of longitudinal ridges extend from each of the two ends of the axle. Each end of the axle has a threaded hole defined in an end surface thereof. The brake disk has a central hole and a plurality of notches defined in an inner periphery of the central hole so as to have protrusions located between the notches. The ridges are received in the notches and a bolt extends Through each of the protrusions and is threadedly engaged with the threaded hole in the ridge.
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