| 摘要 |
An anti-slip device for tyre, which is used for cars to run on snow or ice roads, is easily and freely operated. Brake metal part (3), which is placed at some intervals on the contact surface of tyre (1) with road, can be protruded to outer surface of tyre (1) or indented by operating a press device with the combination of piston. A piston working part is placed inside tyre (1). The piston cylinder (4) is fixed wihin the contact area of tyre (1) with road.
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