"Robinets à papillon." . . "Hydrodynamics." . . "Sanitary Engineering." . . "Water-pipes Valves." . . "Drosselklappe." . . . . . . . "Electronic books"@en . . . . "Ressources Internet" . . . . . . . . . . . . . "Butterfly valves : torque, head loss, and cavitation analysis" . . . . "Butterfly valves torque, head loss, and cavitation analysis" . . . "Butterfly valves torque, head loss, and cavitation analysis"@en . . "Butterfly valves." . . . . "Water-pipes Hydrodynamics." . . "Tuyaux d'eau Robinets." . . "Tuyaux d'eau Hydrodynamique." . .