设一台隐极同步发电机的电枢电流I落后于空载电势E<sub>0</...
Saturday, September 17, 2022
一表头Ig=1mA,Rg=1KΩ,此表作为直流电压表时,要求量程...
Sunday, September 11, 2022
当渐缩喷嘴出口压力p<sub>1</sub>小于临界压力p<su...
Friday, September 16, 2022
Thursday, September 15, 2022
Friday, September 16, 2022
Friday, September 16, 2022
氨吸收式制冷系统中,冷凝器内的压力根据由冷凝温度决定的。...
Friday, September 16, 2022
导体的动态应力系数的含义是什么,在什么情况下,才考虑动态应力?...
Tuesday, September 13, 2022
Wednesday, September 14, 2022
中性点不接地系统发行单相接地短路时,流过接地点的电流性质()...
Saturday, September 17, 2022
在交流电路中,电流的大小随时间按正弦规律变化。交流电弧的温度、直...
Wednesday, September 14, 2022
Wednesday, September 14, 2022
直燃型溴冷(热)水机有三种功能:制冷采暖和供应卫生热水...
Friday, September 16, 2022
Thursday, September 15, 2022
Friday, September 16, 2022
Wednesday, September 14, 2022
Thursday, September 15, 2022
Friday, September 16, 2022
Friday, September 16, 2022
三相半波可控整流电路中,三个晶闸管的触发脉冲互差()度。...
Thursday, September 15, 2022