兑水 发表于 2009-11-20 11:32:34

ASTM F 551-1989 测试轮胎用标准直径[67.23英寸(1.707m)]...

F551-89(2000) Standard Practice for Using a 67.23-in. (1.707-m) Diameter Laboratory Test Roadwheel in Testing Tires
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