但摩擦力(滞后作用)可以保证更平稳地完成油门设定，并缓解在持续挤压弹簧过程中产生的张力。
But the friction (hysteresis) makes it easier to maintain a steady throttle setting, and relieves strain from pushing against the spring continuously.
调节导阀弹簧即可设定出口压力。
当阀门出口压力降到导阀弹簧设定压力时，导阀开启，控制室向下游排水。
When the valve outlet pressure to a pilot valve spring set pressure, pilot valve opens, the control room to the downstream drainage.
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