【单选题】
运用客车中集便装置中污物箱的真空度为_____。___
A. -55~-39kPa
B. -45~-29kPa
C. -35~-19kPa
D. -25~-9kPa
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答案
C
解析
暂无解析
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【单选题】
列车在出发前,按规定对列车制动机进行机能试验,在制动保压状态下列车制动主管的压力1min内漏泄不得超过_____,确认列尾装置作用良好。___
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【单选题】
使用车辆紧急制动阀时,在长大下坡道上,必须先看压力表,如压力表指针已由定压下降_____时,不得再行使用紧急制动阀,遇折角塞门关闭时除外。___
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