‘Good vibration’ hand pump monitors keep and eye on water levels in wells.
“The simple up-and-down motion of hand pumps could help scientists secure a key water source for 200 million people in Africa.” – The BBC –
‘Good vibration’ hand pump monitors keep and eye on water levels in wells.
“The simple up-and-down motion of hand pumps could help scientists secure a key water source for 200 million people in Africa.” – The BBC –
Reserved Water Storage 
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