Water in a Continuous Spray Is Used Along the Face of the Long Wall When the Coal Machine Is in Operation to Cut Down on the Amount of Airborne Dust 04/1974
| Uploaded by | U.S. National Archives |
|---|---|
| License | No known copyright restrictions |
| Comments | 1 |
| Favorites | 3 |
| Views | 12,818 |
| Date taken | 1974 |
| Date uploaded | 2009-09-10 |
| Tags | usnationalarchives, environmentalprotectionagency, documerica, nara:arcid=556361 |
| Visibility | public |