If the transport of liquid viscosity and density difference between the larger and water, shall account for the pump parameters: flow, pressure head and shaft power.

若被输送液体的粘度和密度与水相差较大时，应核算泵的特性参数：流量、压头和轴功率。

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The locking plate includes a first aperture capable of receiving a hook extending from a pump head, a second aperture capable of receiving a drive shaft of the pump head, and a release member.

锁紧板包括第一孔、第二孔和释放元件，其中第一孔能够接收从泵头伸出的钩，第二孔能够接收泵头的驱动轴。

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When pumping water, the head, shaft power and efficiency of the pump decrease with the reducing in impeller diameter.

输送水时，叶轮切割后，泵的扬程、轴功率、效率都下降。

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