The active systems consist of several pumping systems of varying discharge pressure and flow rates, e. g., highheadinjection system, low head injection system.
能动系统由不同注入压力和流量的泵系统组成，如高压安注系统，低压安注系统。
2
Methods 36 patients with avascular necrosis of femoral head used cannulation and continuous medicine injection with high density and medicine was at high concentration in injury place.
方法对36例股骨头缺血性坏死病人采用留置导管连续灌注治疗，将高浓度大剂量的药物直接作用于局部。
3
In addition to the charging function, the centrifugal pumps also serve as the highhead safety injection pumps during emergency core cooling system operation.