SEARCH Articles Figures Tables 6-45° pitched blade turbine-type impeller 6-flat blade disc turbine-type impeller 6-flat blade turbine-type impeller Blade Bladed Example Design with PC Fan Impeller Blade Flat blade impeller Hollow blade impeller Impel Impeller Impeller blade thickness Impeller blade width Impeller flat blade disc turbine Impeller pitch blade Impeller pitched-blade Impeller retreat blade Impeller three-blade marine Impellers flat-blade radial-flow Impellers pitched blade turbine Large blade impellers Retreat blade impeller glass-lined Sigma blade impeller Two-blade impellers