| 摘要 |
In a pressure reducer valve assembly for a vehicle braking system a valve member co-operates with a valve seat of which opposite sides communicate with an inlet connected to a master cylinder and an outlet for connection to a brake, a pressure responsive member controls the position of the valve member in opposition to a spring urging the valve member away from its seat and the position of an abutment member for the spring is controlled in response to a difference in the pressures in two pressure spaces of a master cylinder which supply independent braking circuits.
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