运行中电动机过温度过高有哪血原因?
参考答案:
负载过大;缺相运行;电动机风道阻塞;环境温度升高;定子绕组匝间或相间短路;定子绕组接地;电源电压过高或过低。
Every year, many competitors from famous university come to the Thames to compete each other boating.
A.for; against
B.against; with
C.with; in
D.in; with
募穴的刺激点共有()。
A.12个
B.15个
C.18个
D.21个
E.24个