问题:当横波入射为35°~55°之间,端角横波声压反射率为()。...
Thursday, September 22, 2022
问题:用千斤顶起落梁时,两端交替起落,但两端最大高差一般不超过()。...
Tuesday, September 20, 2022
Thursday, September 22, 2022
问题:计算支架预拱度时,每一个接缝处的非弹性变形,顺纹木料为()。...
Tuesday, September 20, 2022
问题:铝热焊0°探头探伤:≥φ5长横孔当量,焊缝判废,应重新焊接。...
Sunday, September 18, 2022
Friday, September 16, 2022
问题:发动机在冷状态时,发动机活塞敲缸响声(),温度升高后,响声减弱消失。...
Thursday, September 15, 2022
问题:轨道车停留超过二十分钟,开车前必须进行制动试验。...
Thursday, September 15, 2022
Friday, September 16, 2022
问题:在钢中产生横波折射角为90°时的横波入射角称为()。...
Thursday, September 22, 2022
问题:在钢中产生横波折射角为90°时的横波入射角称为()。...
Thursday, September 22, 2022
问题:钩螺栓钩头位置应正确,()钩头面积与钢梁钩紧(优良标准)。...
Thursday, September 22, 2022
问题:D09-32捣固车作业驱动减速箱为一级圆柱齿轮减速,其速比为()。...
Thursday, September 22, 2022
问题:在线路曲线地段,应根据曲线半径和实测行车速度,在外股钢轨合理设置高。...
Saturday, September 17, 2022
Friday, September 16, 2022
问题:喷砂嘴或喷射嘴不准对着()、车、船;不准带风、带砂修理喷砂设备和更换零件。...
Thursday, September 22, 2022
问题:当横波入射为35°~55°之间,端角横波声压反射率为()。...
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 15, 2022
问题:钢管水浸法横波探伤,要求声束入射角在()和()之间。...
Thursday, September 22, 2022