如果只是中间的胎面有损伤，轮子依然是可用的。 A: If the damage is only to the middle treads, the tire is serviceable. B: If the damage is confined to the middle treads, the tire is serviceable. C: If there is damage in the middle treads exclusively, the tire is serviceable. D: If the damage is restricted in the middle treads, the tire is serviceable.