单选题
发布日期:2021-03-22
excessive mist density in the crankcases
excessively high crankcase vacuum
excessively high bearing temperature
excessive carbon buildup in the lube oil
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一台并励直流电动机拖动一台它励直流发电机。当电动机的外加电压、励磁回路电阻均不变时,增加发电机的负载,电动机的电枢电流Ia和转速n将()
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