和谐型电力机车自阀紧急位时,其上的机械阀动作,列车管压力排向大气。( )

作者: tihaiku 人气: - 评论: 0
问题 和谐型电力机车自阀紧急位时,其上的机械阀动作,列车管压力排向大气。( )
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