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笔者认为 ,ＪＺ— 7型空气制动机分配阀副阀部的局减止回阀是可以取消的。局减止回阀的作用 ,在《ＪＺ— 7型空气制动机》(姜靖国编 ,第二版 ,1989年 )书中解释为“再制动时 ,能防止局减室的压力空气逆流到列车管 (即制动管 ) ,避免引起副阀的自然缓解。为控制局减量 ,在止回阀
I believe that, JZ-7-type air brake distribution valve Deputy Bureau of the reduction valve can be canceled. Bureau to reduce the role of check valve, “JZ-7-type air brake” (Jiang Jingguo, second edition, 1989) book interpreted as "re-brake, To the train tube (ie, brake tube), to avoid the natural relief caused by the deputy valve. In order to control the Department of reduction, the check valve