稳定浆液的稳定性标准是2h内的析水率不超过()。 ["2%;","5%;","10%;","15%。"]
取下滤失仪杯后,应怎样确立泥饼的厚度及质量?
如果所测得的绝缘电阻值较上次测量的数值降低()时,则认为绝缘不良。 ["1/2~1/3;","1/3~1/5;","1/5~1/7;","1/7~1/9。"]
硬质合金钻头的水口高度一般为()mm。 ["20-30;","15-20;","10-15;","5-10。"]
发电机定子绕组的绝缘电阻值,在热状态下应不低于每千伏电压()。 ["0.1MΩ;","0.5MΩ;","1MΩ;","1.5MΩ。"]
当测量滤失量时间到时,应立即做些什么?