钢包渣线部位采用的砖是() ["Al-C","Mg-C","Al-Si","Al-Mg"]
选用压力表时主要以介质的压力、()为根据。 ["A.液位","B.温度及性质","C.流量","D.流量及性质"]
浇铸低碳含铝钢时,水口易发生堵塞冻结现象原因是() ["Al2O3富集黏附","Fe2O3富集黏附","SiO2富集黏附","K2O富集黏附"]
渣油泵停泵备用时错误的操作是()。 ["A.保持冷却水","B.关闭冷却水","C.开预热","D.关出口阀"]
启动调频机泵时,电机应_在()给上调频信号。 ["A.开泵前","B.开泵后","C.开泵过程中","D.流量稳定后"]
预塔底部浊如何调节?