The booster pump, which supplies diesel oil to() , should have a possibility of being powered by compressed air or by emergency power.
A. the main engines
B. the auxiliary engines
C. the emergency generator engine
D. the auxiliary engines and the main engine(s)
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属于干灰装车启动步骤的是()
A. 启干灰卸料机
B. 启抽尘风机
C. 启电动锁气器
D. 开气动圆顶阀
E. 开手动闸板门
末级高频功率放大级又称为()
A. 振荡器
B. 调制器
C. 受调放大器
接到进入封锁区间救援的调度命令时,命令不清、()、停留车位置不明时,不准动车。
A. 机车号
B. 开车时间
C. 到达时刻
D. 车次