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eater system. the removal of thsia rater in the coal does not bring about <br />a decrease in eater floc dovnst*=p~. since this rater ie held by the coal <br />ae specific retention in the alts erect environment of the mine. lteaavhile. <br />any free eater in the immedietee vicinity of the excavation continues to <br />floe into the mine cavity to a1t7i>ately become part of the surface eater <br />system. <br />