| Answer | Crossword Clue |
|---|---|
| STEEL | U.S. industry. |
| COAL | Key U. S. industry. |
| FILMS | Important U. S. industry. |
| SPONGES | U. S. gulf-coast industry. |
| STEEL | A leading U. S. industry. |
| SLATER | Pioneer in U.S. cotton industry |
| HENS | Backbone of large U. S. agricultural industry. |
