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Old 08-26-2007, 10:16 PM
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Esteban Esteban is offline
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Join Date: Mar 2005
Location: In the Heart of South America
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Detection in coils and antennas or loops (electronic LRL) occurs by the spontaneous potential causes by conductive bodies. Is all you need to know.

You can read more here:

http://www.wellog.com/surface_sp.htm

And here:
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