单项选择题
A.需要打开液压泵再确认B.从驾驶舱或者刹车毂直接测量C.以上均不对D.N/A
A.BATT.SYSTEM CHANGER UNITB.BACKDRIVE SCREW CONTROL UNITC.BRAKE SYSTEM CONTROL UNITD.N/A
A.储压器B.BSCUC.BYPASS/AUTO-OFF VALVE MODULED.N/A