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Percussion - Stone hammer

288 bytes added, 22:10, 1 May 2012
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- It is slower than machine drilled wells.
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Compared to hand-dug wells, the Stone Hammer has the following advantages:
* Some 40 % cheaper ( $600 versus $1000 for a 20 meter well).
* Better water quality because of deeper penetration in the aquifer.
* Less accidents during construction.
* Less risk of contamination of the water.
==Construction, operations and maintenance==
Winona
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