екстракт лук команда pumps dans покорност разтопен Търговско дружество
Airmoving-Blowers, Pumps, Fans
2nd Edition - Design of Mixed-Flow Pumps and Fans: Characteristics of real fluids; Mixed flow pumps/fans;In-flow; Impeller; Flow through guide-vanes; ... Fan basic control; Operation of fan group.: Zaher, Dr. M. A.: