题目：
车辆上应有哪些主要标记？
答案：
参考答案：
车辆应有识别的标记：路徽、车型、车号、制造厂名及日期、定期修理的日期及处所、自重、载重、容积、换长等；货车应有车号自动识别标签；客车及固定配属的货车上并应有所属局、段的简称；客车还应有车种、定员、最高运行速度标记；罐车还应有标明容量计算表的号码；电化区段运行的客车、机械冷藏车应有“电化区段严禁攀登”的标识。
车辆上应有哪些主要标记？
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