| 165 / | HD | HEAT EXCHANGE |
| DIG 318 | DD | WITH DRIVEN AGITATOR {2} |
| DIG 320 | | .~ Fully rotary agitator {4} |
| DIG 321 | DD | .~.~> Generating toroidal flow |
| DIG 322 | DD | .~.~> Including heat exchange jacket-walls {2} |
| DIG 325 | DD | .~.~> Blade sections mounted along rotating shaft |
| DIG 326 | DD | .~.~> Agitator and heating or cooling coil disposed in same housing |