当磨辊与磨环达到一定磨损后，调整高压弹簧长度，保持磨辊于磨环之间的恒定碾压力。
When the roller mill with a certain ring wear, the length of spring pressure adjusted to maintain a constant link between roller mill on the pressure roller.
最常用的一种回压阀使用弹簧张力和对柱塞的压力来保持压力。
The most common type USES spring tension and pressure against a plunger to maintain the pressure.
最常用的一种回压阀使用弹簧张力和对柱塞的压力来保持压力。
The most common type USES spring tension and pressure against a plunger to maintain the pressure.
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