不属于气压传动优点的是__。A．无介质费用的支出和供应上的困难B．反应快，运动迅速C．升降摆角靠模D．受外界影响小19、异步电动机定子铁心套入机座时，必须保证__位置符合要求，铁心的中心线与机座止口同心，且与止口端面垂直。A．水平B．垂直C．轴向D．径向20、电刷的弹簧压力应符合产品设计要求。压力过大时，电刷机械磨损增加使电刷和换向器的__。A．温度升高B．温度降低C．电流增加D．电流降低21、工艺守则的内容通常不包括__。A．工具设备B．施工准备C．工艺过程D．检查与维护22、防爆电机的接地特点为__。A．接线盒设有内接地螺栓B．接线盒设有外接地螺栓C．铁心必须接地D．接线盒内的接线板必须接地23、双层波绕组的优点是不论极数多少，只有（）个绕组圈，所以极相组间连线少。A．一个B．两个C．四个24、转子端部绑扎设备无纬带绑扎机的绑扎拉力一般不超过__N。A．150B．350C．500D．650
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