Key-Lock ® mechanical joint © 2012 National Oilwell Varco. All rights reserved. CH7264 supersedes FP 1047 - November 2012 www.fgspipe.com • fgspipe@nov.com Open pit mine Kostolac produces coal for thermal power plants in TE-KO system. The ground water has to be lowered to allow appropriate working conditions for excavators/digging machines. The water, coming from the wells, is transported to the recipient open pit mine area. On this sectio

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