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Percussion - Stone hammer

38 bytes added, 03:42, 31 July 2012
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[[Image:icon_stonehammer.png|right]]
[[Image:Stone_hammer_well_drilling.PNG|thumb|right|250px|The Stone-hammer in India, drilling a 20 m deep well in a stony layer . Photo: Netherlands Water Partnership.]]
[[Image:Stone hammer drilling in action.jpg|thumb|right|250px|Stone hammer drilling in action]]
[[Image:Emptying the drill bit.jpg|thumb|right|250px|Emptying the drill bit]]
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