Friday, September 16, 2022
问题:描述某一特定规则反射体的回波高度随距离变化的曲线称为()曲线。...
Saturday, September 17, 2022
问题:超过出厂期两年的响墩应使用机车,车辆进行抽样试验,观察人员应避开...
Friday, September 16, 2022
Saturday, September 17, 2022
Friday, September 16, 2022
问题:RGH20C型道岔打磨车驾驶室前面板上的锁闭按钮的作用?...
Friday, September 16, 2022
问题:如果钻屑芯块卡在钻头里,可卸下钻头,利用顶针从后面将其顶出。...
Saturday, September 17, 2022
Friday, September 16, 2022
问题:检查三角坑就是检测在相距一定距离的水平相差程度,整治三角坑病害,...
Friday, September 16, 2022
问题:指向性好,主声束越窄声能越集中,超声探伤的分辨力越高...
Wednesday, September 14, 2022
Friday, September 16, 2022
问题:较小的探头晶片尺寸发射的超声波束,其远场覆盖面积()。...
Friday, September 16, 2022
问题:RM80型清筛机的换挡手柄只有在()时,才能在三通阀“区间运行”...
Friday, September 16, 2022
Wednesday, September 14, 2022
问题:轨道车()将轮对和构架连接在一起,把轨道车的重量传给轮对。...
Thursday, September 15, 2022
问题:钢轨头部垂直磨耗在钢轨顶面宽()处(距标准工作边)测量。...
Friday, September 16, 2022
问题:列车在何种情况需进行制动机简略试验(试风试闸)?...
Friday, September 16, 2022
问题:当列车密度大时,隧道通风宜优先采用洞口风道式通风。...
Friday, September 16, 2022
Friday, September 16, 2022
问题:强度验算的目的在于使构件的任何截面的计算应力都不超过容许应力。...
Friday, September 16, 2022