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
Friday, September 16, 2022
Saturday, September 17, 2022
成段换轨施工,利用速度不大于120km/h的列车与前一趟列车之间的间隔人工进行材料分散、收集工作必须纳入天窗。...
Saturday, July 15, 2023
钢轨铝热焊头经打磨后的轨头部位应满足:不应出现夹渣或夹砂。...
Wednesday, September 14, 2022
《钢轨探伤管理规则》规定,新焊焊缝横波单探头探伤质量标准为,轨底...
Sunday, September 11, 2022
道口员接车时,应站在指定立岗地点,面向列车认真瞭望,防止列车上的...
Saturday, September 17, 2022
运营中的特殊结构、技术复杂的桥梁,铁路局应每()年进行一次检定,...
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
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
Friday, September 16, 2022
斜拉桥连续梁的跨中合龙梁段前,应做好两端悬臂梁的下列复查、调整工...
Saturday, September 17, 2022
Saturday, September 17, 2022
Friday, September 16, 2022
齿轮油牌号应根据传动齿轮的类型和使用时的负荷以及()来选用。...
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
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
Friday, September 16, 2022