偏置顶针和偏置弹簧系统的积极性较低，因而在顶杆和套筒之间提供一致性较低但仍可接受的连接。

Bias-plunger and bias-spring systems are less aggressive, and subsequently deliver a less consistent, yet still acceptable, connection between plunger and barrel.

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若导阀弹簧配上导向套筒，则可抑制弹簧的摇摆，使导阀芯运动更平稳。

If the pilot valve spring coupled driven sleeve, inhibited the spring swing to lead more stable valve movement.

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