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Multi-stage centrifugal pump, in which comprise at least in each case one running wheel, by means of an existing switching stages wheel body outside of the circumference of the changeover element arranged one behind the other or can be connected in parallel
Multi-stage centrifugal pump, in which comprise at least in each case one running wheel, by means of an existing switching stages wheel body outside of the circumference of the changeover element arranged one behind the other or can be connected in parallel