This model was used to demonstrate how the electric air pump work.
| Attachment | Size |
|---|---|
 redhead_history_of_vacuum_devices_.pdf | 527.72 KB |
Model of air pump after GAEDE
This model was used to demonstrate how the electric air pump work.
| Attachment | Size |
|---|---|
| redhead_history_of_vacuum_devices_.pdf | 527.72 KB |