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the water jet pump has two entry pipes and one exit, and consists, in principle, of two pipes one inside the other. at the water entry a water jet shoots under full pressure out of a nozzle into a slightly larger pipe. the water jet thereby carries away air or fluid from the second entry. this is caused by the negative pressure in a drifting fluid, and thus it is an application of the hydrodynamic paradox (objects close to drifting fluids are aspirated instead of being pushed away).
水冲泵有两根进口管和一根出口管。 当水从喷水口以全部冲力灌入稍大的管道时, 可使得空气和其它流体由于负压在另一个进口被吸入 。 它采用的是水负压的一个应用 。