Suitability & usage of vibratory pumps

Why the vibratory pumps, which are commonly used in Brazil, are not used in rural sector as they can be cheap and efficient ?
Is there any company in india who can supply the vibratory pump which operates at within our utility power supply? Information regarding vibratory pumps can be had here : http://www.kolmus.com.pl/english.htm

Prof.Anil Kadle

anil_kadle@yahoo.co.in

 

 

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