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单选题
在AUTOCHIEF—Ⅳ型主机遥控系统中,当在驾驶台进行主机起动时,主机转速达到了发火转速,但主机转速很快又降了下来,其可能的原因是()。
A
起动空气压力低
B
盘车机未脱开
C
起动油量过低
D
调速器伺服电机与油门总杆未连接
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