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Leader in Mining Construction since 1924 Johnny Cowin specializing in shaft sinking, tunneling, Raise Boring, Mine Development, and Mine Engineering. ...
Concrete tunnel construction  Decline construction  Fault crossings  Headframe erection  Incline construction  Mine plant construction  Raise drilling  Shaft excavation  Slope construction  Underground driftwork  Underground storage bunkers  Ventilation fan installation 
www.cowin-co.com - 2009-02-04
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