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实车碰撞试验表明：改进后，车架结构的耐撞性有明显提高。
The real vehicle crash test indicates that the crashworthiness of the frame structure has improved apparently.
youdao
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实车碰撞试验表明：改进后，车架结构的耐撞性有明显提高。
The real vehicle crash test indicates that the crashworthiness of the frame structure has improved apparently.
youdao