| Air Screen Cleaner |
1975 |
Everson Leroy Iowa State Univ/ISURF-Film |
|
16mm |
|
sound |
| Specific Gravity Separator |
1975 |
Everson Leroy Iowa State Univ/ISURF-Film |
|
16mm |
|
sound |
| Spiral Separator |
1975 |
Everson Leroy Iowa State Univ/ISURF-Film |
|
16mm |
|
sound |
| Velvet Roll Separator |
1975 |
Everson Leroy Iowa State Univ/ISURF-Film |
|
16mm |
|
sound |