长度或荷载调节设备可加到弹簧中。
Length or load adjustment devices can be incorporated into the spring.
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可以工作在正压或负压下，简单的螺丝刀调节，多种弹簧可选。
They work under pressure or suction. Simple screwdriver adjustment. Various springs available.
调节导阀弹簧即可设定出口压力。
Regulating pilot valve outlet pressure spring can be set.
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