| File Name | Size | Date | |
 | Sling_Pump_2008.pdf | 36 KB | 2/24/2010 |
| Spiral_Pumps-How_To_Make_2008.pdf | 1797 KB | 2/24/2010 |
| Tympanum-Type_Spiral_Plastic-Tube_Water_Pump_Wirtz_2002.pdf | 688 KB | 1/22/2003 |
Index of PS-SURVIVAL/PS/Water_Pumps/Spirals |
| File Name | Size | Date | |
| Sling_Pump_2008.pdf | 36 KB | 2/24/2010 |
| Spiral_Pumps-How_To_Make_2008.pdf | 1797 KB | 2/24/2010 |
| Tympanum-Type_Spiral_Plastic-Tube_Water_Pump_Wirtz_2002.pdf | 688 KB | 1/22/2003 |