离合弹簧在自动立木整枝机变速换向过程中起着重要的作用。
Brake springs play an important part in the process of changing speed and direction of automatic pruning machine.
提出了一种采用旋转式换向阀及弹簧蓄能器模拟发动机负载的液压负载模拟系统，详细介绍了该系统的工作原理；
A new hydraulic load simulation system, adopting a rotation directional valve and using a spring accumulator simulating the starter load, is proposed and working principles are described.
在不具备压力试验条件时，不允许拆掉换向阀的铅封和调整调压弹簧座。
In the lack of condition for the pressure test, it is not allowed to remove the lead sealing of the reversing valve to adjust the pressure regulating button.
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