Friday, September 16, 2022
Monday, September 12, 2022
交流异步电动机在变频调速过程中,尽可能使气隙磁通()。...
Friday, September 16, 2022
Monday, September 12, 2022
避雷针和避雷线的保护范围是指被保护物不致遭受雷击的面积。...
Friday, September 16, 2022
Friday, September 16, 2022
启动电动机过程中,应用电流表卡住电动机三根引线的其中一根,测量电...
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Friday, September 16, 2022
项目成本管理由成本预测、成本计划、成本控制、()、成本分析和成本...
Monday, September 12, 2022
Friday, September 16, 2022
Friday, September 16, 2022
通过()使学员动手能力不断增强和提高,熟练掌握操作技能。...
Friday, September 16, 2022
KP10-20表示普通反向阻断型晶闸管的正反向重复峰值电压()。...
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Thursday, September 15, 2022
电压互感器使用时,一次绕组应()在被测电路上,二次绕组绝对不允许...
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某异步电动机的额定功率是10kW,额定转速是955r/min,则...
Friday, September 16, 2022
光栅测量中,标尺光栅与指示光栅应配套使用,它们的线纹密度必须相同...
Friday, September 16, 2022
一台型号为Y-112M-4的三相异步电动机具绝缘等级为B。...
Friday, September 16, 2022