PA31

意外铁路运输损伤事件，不伴有撞车或脱轨

Unintentional railway transport injury event without collision or derailment

索引词可用于检索该条目的同义词与别名

英文词条（8）

Unintentional railway transport injury event without collision or derailment
Person injured while boarding or alighting from railway train or railway vehicle
Occupant of railway train or railway vehicle injured by fall in railway train or railway vehicle
fall in train
fall on train
Occupant of railway train or railway vehicle injured by fall from railway train or railway vehicle
fall from train
Occupant of railway train or railway vehicle injured in derailment without antecedent collision

后组配是在主干编码之后追加的可选扩展轴（如侧别、具体解剖部位、严重程度），用于把「部位 + 侧别 + 病程」等细节一次表达完整。只有标注「必填」的轴在组合编码时必须给出，其余可留空。