One shuttle valve for each gear between the normal brake metering valve and the auto brake pressure control module passes the highest of the output pressures to the brake.In the above sentence," shuttle valve","normal brake metering valve","auto brake pressure control module"means
A.正常刹车管路,自动刹车组件,关断活门; B.;往复活门,正常刹车计量活门,自动刹车组件 C.正常刹车计量活门,往复活门,刹车组件; D.单向活门,自动刹车组件,计量活门;正确答案B
