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yortsed snacilbuper

(7,939 posts) Mon Jun 24, 2013, 04:03 AM Jun 2013

16th-century method may ease mine drainage



Bruce Leavitt, designer and developer of trompe, designed to treat mine drainage, shows a tour how the aeration system works

Bruce Leavitt, designer and developer of trompe, explains the system, which has been installed in Findlay

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