11. "' Centrifugal pumps "'are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. 12. Circulator pumps as used in hydronic systems are usually electrically powered centrifugal pumps . 13. This represents a procurement sequence of events for, in the example demonstration, centrifugal pumps . 14. A centrifugal pump containing two or more impellers is called a multistage centrifugal pump. 15. The condensate was scavenged by electrically-driven centrifugal pumps and fed to the header tanks. 16. By mid-1948, Aerojet had selected centrifugal pumps for both liquid hydrogen and liquid oxygen. 17. A centrifugal pump containing two or more impellers is called a multistage centrifugal pump . 18. Utility and industrial boilers commonly use multi-stage centrifugal pumps ; however, other types are used. 19. This evolved into the current product line of centrifugal pumps . 20. Perhaps the most important of them was his centrifugal pump .
