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jtq metal detector for magnesite in colombia

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they are extremely difficult to detect for a manual deminer with a metal detector which is the standard and most wide-scale means of detection used in the sector further due to the ineffectiveness of metal detectors with minimum metal mines colombian mine action consists of digging 6 inch deep 1-meter-wide trenches

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united international group provides better detection and exploration devices gold detector precious metal detector groundwater detector all devices made in germany