停放制动器快速松放阀
parking brake quick release valve
中轴工作制动器快速松放阀
center axle service brake quick release valve
中轴停放制动器快速松放阀
center axle parking brake quick release valve
控制阀快速闭合
control valve fast closure
并列式双腔气制动阀
parallel dual-chamber air brake valve
串列式双腔气制动阀
series dual -chamber air brake valve
单腔气制动阀
single-chamber air brake valve