单项选择题
A.CRH380AB.CRH380BC.CRH5D.CRH2
A.5M3TB.4M4TC.6M2TD.1M7T
A.轴向弹簧B.垂向减振器C.空气弹簧D.抗侧滚扭杆
A.零下20℃B.零下10℃C.零下30℃D.零下40℃
微信扫一扫,加关注免费搜题