Nowadays, obliged regulations on collision safety of bus has not been carried out in China, of course, experiments about roll-over collision have not been done.
现如今国内没有针对大客车的碰撞安全性的强制性法规，当然也没有具体的翻滚碰撞实验。
Nowadays, obliged regulations on collision safety of bus has not been carried out in China, of course, experiments about roll-over collision have not been done.
现如今国内没有针对大客车的碰撞安全性的强制性法规，当然也没有具体的翻滚碰撞实验。
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