| 摘要 |
A disc brake of a two-wheeled vehicle comprises two friction pads which press against either side of a disc rotating along with the wheel of the vehicle in motion. The friction pads are provided with a friction surface. The disc is provided in the surface of both sides thereof with a plurality of first arrest surfaces, second arrest surfaces, and recesses, which are all exerted on sequentially by a stress brought about by the friction surface of the friction pads at the time when the friction pads press on the disc.
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