http://www.youtube.com/watch?v=ZfZM3xmP2e0
In rural plains of Nepal a simple treadle pump helps cultivate land for the poor increasing their income. A treadle pump is a simple and cheap technology tha…
http://www.youtube.com/watch?v=ZfZM3xmP2e0
In rural plains of Nepal a simple treadle pump helps cultivate land for the poor increasing their income. A treadle pump is a simple and cheap technology tha…