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Date: 2009-05-14 07:34:31Appropriate technology Water wells Oil wells Sludging Water Casing Well drilling Lost circulation Drill bit Borehole Baptist well drilling | HAND SLUDGING A REPORT FROM NORTH WEST BENGAL Peter Ball and Kerstin Danert Marchan internal report of the Low Cost Drilling ProjectAdd to Reading ListSource URL: www.watersanitationhygiene.orgDownload Document from Source WebsiteFile Size: 2,27 MBShare Document on Facebook |