SW-220K型转向架使用()。 ["KKD车轮","KDS车轮","KD车轮","KDQ车轮"]
电流互感器在运行中二次回路不准开路?
对于振动负荷或起重用电动机,电刷压力要比一般电动机增加()。 ["30%~40%","40%~50%","50%~70%","75%"]
检查制动踏板需检测哪些项目?
用弹簧秤测量电刷的压力时,一般电动机电刷的压力为()。 ["0.015~0.025MPa","0.025~0.035MPa","0.035~0.04MPa","0.04~0.045MPa"]
土壤侵蚀模拟