| 摘要 |
PROBLEM TO BE SOLVED: To provide a brake disc that has a mechanism for preventing melt of an aluminum alloy disc surface by means of a burst of a refrigerant in a vehicle emergency stop. SOLUTION: A friction plate of a metal-base composite material having small holes and a cavity so that the disc itself can be filled in advance with a refrigerant is manufactured and assembled, with the result that the refrigerant can burst out to prevent a temperature rise in an emergency stop.
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