福州向塘鹰潭南昌

挂车后，制动主管达到定压后，司机按规定及检车人员的要求进行（　　）试验，装有防折关装置的机车应确认制动主管贯通情况。

发布于 2021-02-16 13:54:49

【单选题】
A 机车给流
B 空压机
C 列车制动机

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