作者: Kazunori Yoshino
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摘要: In one aspect of the invention, hydraulic system provided with pressure source and at least meter-in spool valve. Each Spool valve has an inlet outlet. A actuator is fluidly coupled load hold check interconnects inlet. The a control chamber. three way first port in fluid communication chamber, second inlet, third source. Proved flow to are provided, make-up line relief without use additional