试题详情

CRH380B型动车组三/四级修舱壁板、隔板无损伤或严重变形(舱壁板有疑似裂纹时,须探伤检查), 舱壁板破损或变形量面积大于()mm2 且深度大于 3mm 时更新

A50mm*50mm

B100mm*100mm

C150mm*150mm

D200mm*200mm