| 165 / | HD | HEAT EXCHANGE |
| DIG 92 | DD | WITH VALVE OR MOVABLE DEFLECTOR FOR HEAT EXCHANGE FLUID FLOW {6} |
| DIG 101 | DD | .~ For controlling supply of heat exchange fluid flowing between hydraulically independent heat exchange sections {2} |
| DIG 102 | | .~.~ Hydraulically independent single-confined-fluid radiator sections for heating ambient air {1} |
| DIG 103 | DD | .~.~.~> Valves each controls a radiator section |