外直径    overall diameter

过载保护?    over-current protection

超速档    overdirve gear

过热?    overheating

重迭阀    overlap valve

过载系数    overloading ratio

穿通式联条?    over-partition connector

超速制动器    overrun brake

超限换档    overrun shift

过度转向    oversteering

臭氧箱?    ozone chamber

耐臭氧试验    ozone resistance test