Closeup of an experimental solar heating flat plate collector using bonded honeycomb material for an air heating system, 05/1975.
| Uploaded by | U.S. National Archives |
|---|---|
| License | No known copyright restrictions |
| Comments | 0 |
| Favorites | 3 |
| Views | 6,513 |
| Date taken | 1975-05 |
| Date uploaded | 2012-04-10 |
| Tags | usnationalarchives, documerica, environmentalprotectionagency, boydnorton, nara:arcid=557311 |
| Visibility | public |