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可控硅变流器—直流电动机电力拖动系统,它包括了电枢换向的可逆直流电力拖动系统和()换向的可逆直流电流拖动系统。A、快速B、可靠C、自动D、磁场...
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绕线式异步电动机起动时,为改善起动性能,将转子绕组接入起动()...
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一电阻元件,当其电流减为原来一半时,其功率为原来的()。...
Sunday, September 11, 2022
Sunday, September 11, 2022
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某用电稽查负责人赵某,在屡次接到群众有关某电杆拉线带电危及行人安...
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