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Hand auger - Vonder rig

9 bytes removed, 02:43, 17 July 2012
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[[Image:drilling icon.png|right]]
[[Image:Vonder rig in action.jpg|thumb|right|250px|Vonder rig in action]]
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The Vonder rig is a [[Hand auger - general|hand auger method]] method that uses a heavy tripod, a winch, and a working table. It has been used extensively in Zimbabwe and distributed widely in sub-Saharan Africa. The cutting tool (auger head) is rotated to cut into the ground, and then withdrawn to remove excavated material. This is repeated until the required depth is reached.
Winona
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