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 一、單項選擇題1.當(dāng)采用750V制時,其電壓允許波動范圍分別為()。A.500~900VB.500~1000VC.600~1000VD.600~1100V2.當(dāng)采用1500V制時,其電壓允許波動范圍分別為()。A.900~1600VB.900~1700VC.1000~1600VD.1000~1800V3.影響牽引變電所數(shù)量的關(guān)鍵 (共 1231 字) [閱讀本文] >>