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[新闻直播间]山西太原 发现一处北魏后期石窟
山西太原发现一处北魏后期石窟。
14 小时
国内能造发动机,为啥造不好 AT 变速箱?原来事情没那么简单
- **技术积累不足**:国外汽车工业发展较早,在 AT 变速箱技术上有着长期的研发和实践积累,如液力变矩器的设计、行星齿轮组的结构优化、换挡逻辑的控制等关键技术,都经过了多年的改进和完善。相比之下,国内汽车工业起步较晚,在 AT ...
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