| 416 / | HD | FLUID REACTION SURFACES (I.E., IMPELLERS) |
| 179 | DF | ROTOR HAVING FLOW CONFINING OR DEFLECTING WEB, SHROUD OR CONTINUOUS PASSAGE {4} |
| 189 | | .~ Axially extending shroud ring or casing {4} |
| 190 | DF | .~.~> Vibration inhibiting or expansion-contraction structure |
| 191 | DF | .~.~> Segmental shroud |
| 192 | DF | .~.~> Having radial flange |
| 193 R | DF | .~.~> Spaced inwardly of impeller periphery {1} |