阀芯的特殊结构，保证任意两缸换向时的流量曲线的良好衔接，从而减少换向冲击。
Special structure of the spool can ensure that the flow curve of any change to the two-cylinder has the good convergence, and thereby the shock of exchange is reduced.
阀芯的特殊结构，保证任意两缸换向时的流量曲线的良好衔接，从而减少换向冲击。
Special structure of the spool can ensure that the flow curve of any change to the two-cylinder has the good convergence, and thereby the shock of exchange is reduced.
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