Line presentation by ruchika - SlideShareSep 13, 2011 . This presentation will tell about line and its uses. . Chalk (Soft) Line (CaCO 3 ) (Comparatively hard) Marble ( Mining Method Open.presentation on line mining,Line - SlideShareMay 21, 2012 . Line quarry in ia U.S.A Line in middle ages Line was also a very popular building block in the Middle Line.
presentation on line mining