| 366 / | HD | AGITATING |
| 241 | DF | STIRRER WITHIN STATIONARY MIXING CHAMBER {10} |
| 279 | DF | .~ Rotatable stirrer {15} |
| 290 | ![]() | .~.~ In at least one of intercommunicating adjacent mixing chambers {1} |
| 291 | DF | .~.~.~> Plural stirrers on parallel axes in adjacent mixing chambers |