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Sludging - Baptist method
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18:36, 20 April 2009
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{{procontable | pro=- Very simple and cheap equipment <br>
- continuous movement (compared to augering)<br>
- small diameter borehole possible <br>
- Does not clog quickly in clay soils
- No need for mud pump and tower<br>
- Long extensions of the drill stem are possible<br>
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