并通过离心泵和组合式离心泵在吸程相同的条件下进行2组抽水对比试验，试验

And through the centrifugal pump and the combined centrifugal pump under the same suction stroke, two sets of pumping comparison tests are carried out. The test shows that the combined centrifugal pump avoids the trouble of perfusion and water diversion, and it can be used under the condition of 3 meters. Suction water up; but under the condition that the suction range is 6 meters, the combined centrifugal pump can suck up water, but the centrifugal pump cannot. That is, the combined centrifugal pump increases the suction range from 3 to 6 meters.

Two groups of pumping comparison tests are carried out by centrifugal pump and combined centrifugal pump under the same suction lift. The test shows that the combined centrifugal pump avoids the trouble of filling and water diversion, and can suck up water under the condition of suction lift of 3M; However, when the suction lift is 6 meters, the combined centrifugal pump can suck up water, but the centrifugal pump cannot, that is, the combined centrifugal pump increases the suction lift from 3 to 6 meters,

Through two groups of pumping contrast tests of centrifugal pump and combined centrifugal pump under the same suction range, the test shows that the combined centrifugal pump avoids the trouble of pouring water, and can suck water up under the condition of suction range of 3 meters; However, under the condition that the suction distance is 6 meters, the combined centrifugal pump can suck water up, but the centrifugal pump can't, that is, the combined centrifugal pump increases the suction distance from 3 meters to 6 meters.