6 April 2010
- 01:2301:23, 6 April 2010 diff hist −8 How to build a hand powered pump →Cost Analysis
- 01:2201:22, 6 April 2010 diff hist −12 How to build a hand powered pump →Cost Analysis
- 01:1801:18, 6 April 2010 diff hist +214 How to build a hand powered pump →Suggested Design
- 01:1201:12, 6 April 2010 diff hist 0 How to build a hand powered pump →Required Materials
- 01:1101:11, 6 April 2010 diff hist −1 How to build a hand powered pump →Regional Considerations
- 01:0701:07, 6 April 2010 diff hist +15 How to build a hand powered pump →Calculations
- 01:0501:05, 6 April 2010 diff hist +1 How to build a hand powered pump →Calculations
- 01:0401:04, 6 April 2010 diff hist 0 How to build a hand powered pump →Calculations
- 01:0301:03, 6 April 2010 diff hist +11 How to build a hand powered pump →Calculations
- 01:0101:01, 6 April 2010 diff hist +13 How to build a hand powered pump →Calculations
- 00:5200:52, 6 April 2010 diff hist +117 How to build a hand powered pump →Calculations
- 00:3300:33, 6 April 2010 diff hist 0 How to build a hand powered pump →Prototype
- 00:3300:33, 6 April 2010 diff hist +23 How to build a hand powered pump →Prototype
- 00:3200:32, 6 April 2010 diff hist +97 How to build a hand powered pump →Prototype
5 April 2010
4 April 2010
- 17:5217:52, 4 April 2010 diff hist −78 How to build a hand powered pump →Prototype
- 17:3617:36, 4 April 2010 diff hist +78 How to build a hand powered pump →Prototype
- 08:1108:11, 4 April 2010 diff hist +138 How to build a hand powered pump →Cost Analysis
- 08:0508:05, 4 April 2010 diff hist +384 How to build a hand powered pump →Cost Analysis
- 07:5907:59, 4 April 2010 diff hist +231 How to build a hand powered pump →Cost Analysis