However, the need for oil flow in hydraulic circuit reverse flows can use hydraulic control, opening a one-way valve, so that the flow of oil can flow in both directions.
但在液压回路中需要油流反向流动时又可利用控制油压，打开单向阀，使油流在两个方向都可流动。
For the hydraulic system to prevent reverse flow of oil flow.
用于液压系统中防止油流反向流动。
For the hydraulic system to prevent reverse flow of oil flow.
用于液压系统中防止油流反向流动。
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