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 |