[ 复数 underruns 第三人称单数 underruns 现在分词 underrunning 过去式 underran 过去分词 underrun ]
The front and rear underrun protections can effectively protect passenger cars from inserting under trucks, rational energy absorption characteristics can improve impact compatibility.
前、后下部防护装置能有效地防止轿车钻入，合理的能量吸收特性可改善载货汽车与轿车的碰撞相容性。
Therefore, the research on collision characteristics of motor vehicles and trailers rear underrun protection for improving the safety performance of automobile collision is of great significance.
因此，研究车辆后下部防护装置的碰撞特性，对于提高汽车碰撞安全性具有重要的意义。
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