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WATER PUMP - MARATHI - 20MB.wmv

WATER PUMP - MARATHI - 20MB.wmv
  Arvind Gupta
526   370K  

For 700 million people living in Indian villages the Hand Pump provides safe drinking water. This simple model made from a film can, coin, bottle lid, spoke clearly explains the working of the Hand Pump. As children move the piston up-down large quantitie


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