| 摘要 |
A two stage valve system is described in which the rate of flow of fluid to the load depends solely on the input signal to the first stage. Both stages are spool type valves. The second stage is formed to provide a passageway to allow fluid to flow from the first stage to the load, which passageway is opened simultaneously with the opening of the usual passageway from the second stage supply to the load. Additionally, the second stage supply is connected through restricted passageways to the second stage end spaces.
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