采用恒压变量柱塞泵，输出压力保持恒定，输出流量根据系统需要而变化。
Using constant pressure variables plunger pump, output pressure can keep constant and flow varies as per system's demand.
然后应用能量守恒定律去求得螺杆泵转子的设计规律。
Then, find out the design rules with the conservation law of energy.
滤液回收水补入将液箱用于维持浆液恒定密度，磨机浆液循环泵用于转运一台磨机的浆液到石灰石旋流器。
Reclaim water is also fed into the ball mill product tank to maintain a constant slurry density. One ball mill product pump per ball mill feeds the limestone slurry to a dedicated classifier.
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