| 126 / | HD | STOVES AND FURNACES |
| 569 | DF | SOLAR HEAT COLLECTOR {18} |
| 634 | DF | .~ With means to convey fluent medium through collector {7} |
| 651 | DF | .~.~ Conduit absorber structure {9} |
| 658 | DF | .~.~.~ Having heat-absorbing fin or plate {4} |
| 662 | ![]() | .~.~.~.~ Conduit positioned in a groove in the plate |